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ModelsOpenAIGPT-5.1

GPT-5.1

Retiring Apr 1, 2027: The model will be withdrawn by its lab or by every seller listing it · announced on developers.openai.com · read on Oct 31, 2026 · announced replacement: GPT-6 Sol (opens in a new tab)
openai/gpt-5.1400k context Compare →
MedianThe median blended price among comparable offers: one price per provider (its cheapest route), standard tier, current prices only. Priority tiers and prices converted from points are not counted.
$3.44
Most expensiveThe highest blended price among comparable offers: one price per provider (its cheapest route), standard tier, current prices only. Priority tiers and prices converted from points are not counted.
$3.78
Offers
34
Providers
15

Cheapest right now

OpenAI

The provider's published policy: prompts are not used for training.

400k

$3.44 blended / 1M tokens

No change7D
in
$1.25
out
$10.00
Cached input
$0.125
See pricing See pricing at OpenAI (opens in a new tab)via OpenAI

Public leaderboards

  • Text Arena, style controlThe series the source publishes by default for text since 16 May 2025: ranks corrected for the style of the answers (style control).High setting #58 of 419Best rank in the source's rank spread, 58th to 84th, given the confidence intervals of all ranked models. 69th by score. 1,456 1,452 to 1,459Arena Score · 41,639 votes listed as “GPT-5.1 (High)”
  • Text Arena, style controlThe series the source publishes by default for text since 16 May 2025: ranks corrected for the style of the answers (style control). #86 of 419Best rank in the source's rank spread, 86th to 117th, given the confidence intervals of all ranked models. 100th by score. 1,439 1,435 to 1,442Arena Score · 44,413 votes
  • Code Arena (WebDev)The Code Arena ranking (WebDev). The source publishes no style-corrected series (as read on 9 October 2026).Medium setting #92 of 152Best rank in the source's rank spread, 92nd to 110th, given the confidence intervals of all ranked models. 104th by score. 1,396 1,384 to 1,407Arena Score · 4,891 votes listed as “GPT-5.1 (Medium)”
  • Code Arena (WebDev)The Code Arena ranking (WebDev). The source publishes no style-corrected series (as read on 9 October 2026). #119 of 152Best rank in the source's rank spread, 119th to 129th, given the confidence intervals of all ranked models. 123rd by score. 1,341 1,333 to 1,350Arena Score · 10,675 votes

Source: Arena (opens in a new tab) · Data under the CC BY 4.0 license (creativecommons.org/licenses/by/4.0) · CC BY 4.0 (opens in a new tab) · scores and ranks as published on 28 Oct 2026; the presentation is ours

GPT-5.1 costs from $3.44 per million tokens (at a 3:1 input:output mix): the lowest current price, at 6 providers, checked on ; 34 offers are listed.

Listed offers, by price

Comparable offersOther offersSolid steps are comparable offers; dashed steps are the other offers, which are not counted in cheapest, median or most expensive.Official list price

Offers not counted in cheapest, median or most expensive (25)

  • $3.13 · Poe via Poe · price converted from points
  • $3.44 · OpenAI via Eden AI · cannot be designated the cheapest
  • $3.44 · OpenAI via Kilo Gateway · cannot be designated the cheapest
  • $3.44 · OpenAI via LLM API · cannot be designated the cheapest
  • $3.44 · Azure via Eden AI · cannot be designated the cheapest
  • $3.44 · Azure via Kilo Gateway · cannot be designated the cheapest
  • $3.44 · Azure via LLM API · cannot be designated the cheapest
  • $3.44 · Abacus RouteLLM via Abacus RouteLLM · cannot be designated the cheapest
  • $3.44 · FastRouter via FastRouter · cannot be designated the cheapest
  • $3.44 · Glama via Glama · cannot be designated the cheapest
  • $3.44 · Martian via Martian · cannot be designated the cheapest
  • $3.44 · Nous Portal via Nous Portal · cannot be designated the cheapest
  • $3.44 · OrcaRouter via OrcaRouter · cannot be designated the cheapest
  • $3.44 · OpenAI via LLM Gateway · another route of the same provider
  • $3.44 · OpenAI via Requesty · another route of the same provider
  • $3.44 · OpenAI via OpenRouter · another route of the same provider
  • $3.44 · Azure via OpenRouter · another route of the same provider
  • $3.62 · ShengSuanYun via ShengSuanYun · cannot be designated the cheapest
  • $3.78 · Azure via Eden AI · cannot be designated the cheapest
  • $3.78 · Azure via Eden AI · cannot be designated the cheapest
  • $3.78 · Azure via Kilo Gateway · cannot be designated the cheapest
  • $3.78 · Azure via OpenRouter · another route of the same provider
  • $3.78 · Cortecs via Cortecs · cannot be designated the cheapest
  • $6.88 · OpenAI via Kilo Gateway · cannot be designated the cheapest
  • $6.88 · OpenAI via OpenRouter · priority tier

Price historyThe cheapest offer each day, against the lab's official list price when it publishes one. Each day at 00:00 UTC, the offer the API would have selected as the cheapest, with the same exclusions as /cheapest. Blended price, promotions included.

Cheapest offer and official list price, by day, 30 days
DayCheapest offerOfficial list price
2026-10-02$3.44, Abacus RouteLLM$3.44
2026-10-03$3.44, Abacus RouteLLM$3.44
2026-10-04$3.44, Abacus RouteLLM$3.44
2026-10-05$3.44, Abacus RouteLLM$3.44
2026-10-06$3.44, OpenAI$3.44
2026-10-07$3.44, OpenAI$3.44
2026-10-08$3.44, OpenAI$3.44
2026-10-09$3.44, OpenAI$3.44
2026-10-10$3.44, OpenAI$3.44
2026-10-11$3.44, OpenAI$3.44
2026-10-12$3.44, OpenAI$3.44
2026-10-13$3.44, OpenAI$3.44
2026-10-14$3.44, OpenAI$3.44
2026-10-15$3.44, OpenAI$3.44
2026-10-16$3.44, OpenAI$3.44
2026-10-17$3.44, OpenAI$3.44
2026-10-18$3.44, OpenAI$3.44
2026-10-19$3.44, OpenAI$3.44
2026-10-20$3.44, OpenAI$3.44
2026-10-21$3.44, OpenAI$3.44
2026-10-22$3.44, OpenAI$3.44
2026-10-23$3.44, OpenAI$3.44
2026-10-24$3.44, OpenAI$3.44
2026-10-25$3.44, OpenAI$3.44
2026-10-26$3.44, OpenAI$3.44
2026-10-27$3.44, OpenAI$3.44
2026-10-28$3.44, OpenAI$3.44
2026-10-29$3.44, OpenAI$3.44
2026-10-30$3.44, OpenAI$3.44
2026-10-31$3.44, OpenAI$3.44

Cheapest offerOfficial list price

Offers

The 25 cheapest of 34 offers

Offers for GPT-5.1, one row per offer, sorted by blended price.
RankProvider · viaYou buy access through an aggregator: one account and one API that forward your requests to other providers. "Via" names the aggregator; the price is the one it charges you. When "via" says "hosted API", no aggregator is involved: the model belongs to a lab and another provider sells it.Input $/1MOutput $/1MBlended $/1MA single price that mixes input and output: 3 input tokens for 1 output token, per million tokens. It makes offers easy to rank; your real cost depends on your own mix. ContextThe maximum amount of text, counted in tokens, the model can take in and write in a single request. Past this limit, the request is refused or cut.ConditionsWhat a provider says about how it handles your data and who can sign up: training on prompts, processing region, sign-up requirements. Each comes from the provider's published documents; when nothing is published, it stays unknown.SignalsOffer
1 Poe 1.14 9.09 3.13 400k Unverified. No public page for this offer: listed, not designated cheapestBelow the lab's list price: Resold below the lab's list price (−9% vs lab list price), without a declared discount.priced in points: Converted from points or credits: the amount paid depends on how points are bought.
No public offer page
2 OpenAI 1.25 10.00 3.44 –
See pricing at OpenAI (opens in a new tab)
3 NanoGPT 1.25 10.00 3.44 400k
Go to offer at NanoGPT (opens in a new tab)
4 OpenAIvia Eden AI 1.25 10.00 3.44 400k Unverified. No public page for this offer: listed, not designated cheapest
: Eden AI (opens in a new tab). No public price page for this model
5 OpenAIvia Kilo Gateway 1.25 10.00 3.44 400k Unverified. The source page shows one price per model, not this seller's: listed, not designated cheapest
Go to offer at Kilo Gateway (opens in a new tab)
6 OpenAIvia LLM API 1.25 10.00 3.44 – Unconfirmed. Last checked 18 October 2026: the last published value, not a confirmed one Unverified. The source page shows one price per model, not this seller's: listed, not designated cheapest
See pricing at LLM API (opens in a new tab)
7 Azurevia Eden AI 1.25 10.00 3.44 272k Unverified. No public page for this offer: listed, not designated cheapest
: Eden AI (opens in a new tab). No public price page for this model
8 Azurevia Kilo Gateway 1.25 10.00 3.44 400k Unverified. The source page shows one price per model, not this seller's: listed, not designated cheapest
Go to offer at Kilo Gateway (opens in a new tab)
9 Azurevia LLM API 1.25 10.00 3.44 – Unconfirmed. Last checked 18 October 2026: the last published value, not a confirmed one Unverified. The source page shows one price per model, not this seller's: listed, not designated cheapest
See pricing at LLM API (opens in a new tab)
10 NEAR AIhosted APISold by a provider other than the lab that made the model. 1.25 10.00 3.44 400k
See pricing at NEAR AI (opens in a new tab)
11 Abacus RouteLLM 1.25 10.00 3.44 400k United States Unverified. No public page for this offer: listed, not designated cheapest
: Abacus RouteLLM (opens in a new tab). No public price page for this model
12 FastRouter 1.25 10.00 3.44 400k Unverified. Neither seller nor price found on its page for 72 hours: listed, not designated cheapest
Go to offer at FastRouter (opens in a new tab)
13 Glama 1.25 10.00 3.44 400k Unverified. No public page for this offer: listed, not designated cheapest
: Glama (opens in a new tab). No public price page for this model
14 Martian 1.25 10.00 3.44 – worldwide Unverified. Neither seller nor price found on its page for 72 hours: listed, not designated cheapest
See pricing at Martian (opens in a new tab)
15 Nous Portal 1.25 10.00 3.44 400k Unverified. Neither seller nor price found on its page for 72 hours: listed, not designated cheapest
See pricing at Nous Portal (opens in a new tab)
16 OrcaRouter 1.25 10.00 3.44 400k Unverified. Neither seller nor price found on its page for 72 hours: listed, not designated cheapest
Go to offer at OrcaRouter (opens in a new tab)
17 RedPill 1.25 10.00 3.44 400k
Go to offer at RedPill (opens in a new tab)
18 ZenMux 1.25 10.00 3.44 400k
Go to offer at ZenMux (opens in a new tab)
19 OpenAIvia LLM Gateway 1.25 10.00 3.44 – Fee 5%: LLM Gateway adds a 5% fee on credit usage, plus 1.5% for cards issued outside the US (read on llmgateway.io/pricing on Oct 30). Offers are ranked with the 5% included.
Go to offer at LLM Gateway (opens in a new tab)
20 Azurevia LLM Gateway 1.25 10.00 3.44 – Fee 5%: LLM Gateway adds a 5% fee on credit usage, plus 1.5% for cards issued outside the US (read on llmgateway.io/pricing on Oct 30). Offers are ranked with the 5% included.
Go to offer at LLM Gateway (opens in a new tab)
21 OpenAIvia Requesty 1.25 10.00 3.44 400k Fee 5%: Requesty adds a 5% markup (read on requesty.ai/pricing on Oct 30). Offers are ranked with this fee included.
Go to offer at Requesty (opens in a new tab)
22 Azurevia Requesty 1.25 10.00 3.44 400k United States Fee 5%: Requesty adds a 5% markup (read on requesty.ai/pricing on Oct 30). Offers are ranked with this fee included.
Go to offer at Requesty (opens in a new tab)
23 OpenAIvia OpenRouter 1.25 10.00 3.44 400k Fee 5.5%: OpenRouter adds a 5.5% fee when you buy credits (read on openrouter.ai/pricing on Oct 30). Offers are ranked with this fee included.
Go to offer at OpenRouter (opens in a new tab)
24 Azurevia OpenRouter 1.25 10.00 3.44 400k Fee 5.5%: OpenRouter adds a 5.5% fee when you buy credits (read on openrouter.ai/pricing on Oct 30). Offers are ranked with this fee included.
Go to offer at OpenRouter (opens in a new tab)
25 ShengSuanYun 1.32 10.52 3.62 400k Unverified. No public page for this offer: listed, not designated cheapest
: ShengSuanYun (opens in a new tab). No public price page for this model

No training on promptsPrompts may be used for trainingTraining terms not published

backend not named. The router bills this price itself without naming who serves the model.

  • Poe

    $3.13

    Poe

    in
    $1.14
    out
    $9.09
    Context
    400k

    Prompts may be used for trainingUnverified. No public page for this offer: listed, not designated cheapestBelow the lab's list price: Resold below the lab's list price (−9% vs lab list price), without a declared discount.priced in points: Converted from points or credits: the amount paid depends on how points are bought.

    No public offer page

  • OpenAI

    $3.44

    OpenAI

    in
    $1.25
    out
    $10.00
    Context
    –

    No training on prompts

    See pricing See pricing at OpenAI (opens in a new tab)via OpenAI

  • NanoGPT

    $3.44

    NanoGPT

    in
    $1.25
    out
    $10.00
    Context
    400k

    No training on prompts

    Go to offer Go to offer at NanoGPT (opens in a new tab)via NanoGPT

  • OpenAI

    $3.44

    Eden AI

    in
    $1.25
    out
    $10.00
    Context
    400k

    Prompts may be used for trainingUnverified. No public page for this offer: listed, not designated cheapest

    Seller's site: Eden AI (opens in a new tab)No public price page for this model

  • OpenAI

    $3.44

    Kilo Gateway

    in
    $1.25
    out
    $10.00
    Context
    400k

    Training terms not publishedUnverified. The source page shows one price per model, not this seller's: listed, not designated cheapest

    Go to offer Go to offer at Kilo Gateway (opens in a new tab)via Kilo Gateway

  • OpenAI

    $3.44

    LLM API

    in
    $1.25
    out
    $10.00
    Context
    –

    No training on promptsUnconfirmed. Last checked 18 October 2026: the last published value, not a confirmed oneUnverified. The source page shows one price per model, not this seller's: listed, not designated cheapest

    See pricing See pricing at LLM API (opens in a new tab)via LLM API

  • Azure

    $3.44

    Eden AI

    in
    $1.25
    out
    $10.00
    Context
    272k

    Prompts may be used for trainingUnverified. No public page for this offer: listed, not designated cheapest

    Seller's site: Eden AI (opens in a new tab)No public price page for this model

  • Azure

    $3.44

    Kilo Gateway

    in
    $1.25
    out
    $10.00
    Context
    400k

    Training terms not publishedUnverified. The source page shows one price per model, not this seller's: listed, not designated cheapest

    Go to offer Go to offer at Kilo Gateway (opens in a new tab)via Kilo Gateway

  • Azure

    $3.44

    LLM API

    in
    $1.25
    out
    $10.00
    Context
    –

    No training on promptsUnconfirmed. Last checked 18 October 2026: the last published value, not a confirmed oneUnverified. The source page shows one price per model, not this seller's: listed, not designated cheapest

    See pricing See pricing at LLM API (opens in a new tab)via LLM API

  • NEAR AI

    $3.44

    hosted APISold by a provider other than the lab that made the model.

    in
    $1.25
    out
    $10.00
    Context
    400k

    No training on prompts

    See pricing See pricing at NEAR AI (opens in a new tab)at NEAR AI

  • Abacus RouteLLM

    $3.44

    Abacus RouteLLM

    in
    $1.25
    out
    $10.00
    Context
    400k

    No training on promptsUnited StatesUnverified. No public page for this offer: listed, not designated cheapest

    Seller's site: Abacus RouteLLM (opens in a new tab)No public price page for this model

  • FastRouter

    $3.44

    FastRouter

    in
    $1.25
    out
    $10.00
    Context
    400k

    Training terms not publishedUnverified. Neither seller nor price found on its page for 72 hours: listed, not designated cheapestbackend not named: The router bills this price itself without naming who serves the model.

    Go to offer Go to offer at FastRouter (opens in a new tab)via FastRouter

  • Glama

    $3.44

    Glama

    in
    $1.25
    out
    $10.00
    Context
    400k

    No training on promptsUnverified. No public page for this offer: listed, not designated cheapestbackend not named: The router bills this price itself without naming who serves the model.

    Seller's site: Glama (opens in a new tab)No public price page for this model

  • Martian

    $3.44

    Martian

    in
    $1.25
    out
    $10.00
    Context
    –

    Training terms not publishedworldwideUnverified. Neither seller nor price found on its page for 72 hours: listed, not designated cheapestbackend not named: The router bills this price itself without naming who serves the model.

    See pricing See pricing at Martian (opens in a new tab)via Martian

  • Nous Portal

    $3.44

    Nous Portal

    in
    $1.25
    out
    $10.00
    Context
    400k

    Prompts may be used for trainingUnverified. Neither seller nor price found on its page for 72 hours: listed, not designated cheapestbackend not named: The router bills this price itself without naming who serves the model.

    See pricing See pricing at Nous Portal (opens in a new tab)via Nous Portal

  • OrcaRouter

    $3.44

    OrcaRouter

    in
    $1.25
    out
    $10.00
    Context
    400k

    Training terms not publishedUnverified. Neither seller nor price found on its page for 72 hours: listed, not designated cheapestbackend not named: The router bills this price itself without naming who serves the model.

    Go to offer Go to offer at OrcaRouter (opens in a new tab)via OrcaRouter

  • RedPill

    $3.44

    RedPill

    in
    $1.25
    out
    $10.00
    Context
    400k

    Training terms not published

    Go to offer Go to offer at RedPill (opens in a new tab)via RedPill

  • ZenMux

    $3.44

    ZenMux

    in
    $1.25
    out
    $10.00
    Context
    400k

    Prompts may be used for training

    Go to offer Go to offer at ZenMux (opens in a new tab)via ZenMux

  • OpenAI

    $3.44

    LLM Gateway

    in
    $1.25
    out
    $10.00
    Context
    –

    No training on promptsFee 5%: LLM Gateway adds a 5% fee on credit usage, plus 1.5% for cards issued outside the US (read on llmgateway.io/pricing on Oct 30). Offers are ranked with the 5% included.

    Go to offer Go to offer at LLM Gateway (opens in a new tab)via LLM Gateway

  • Azure

    $3.44

    LLM Gateway

    in
    $1.25
    out
    $10.00
    Context
    –

    No training on promptsFee 5%: LLM Gateway adds a 5% fee on credit usage, plus 1.5% for cards issued outside the US (read on llmgateway.io/pricing on Oct 30). Offers are ranked with the 5% included.

    Go to offer Go to offer at LLM Gateway (opens in a new tab)via LLM Gateway

  • OpenAI

    $3.44

    Requesty

    in
    $1.25
    out
    $10.00
    Context
    400k

    Prompts may be used for trainingFee 5%: Requesty adds a 5% markup (read on requesty.ai/pricing on Oct 30). Offers are ranked with this fee included.

    Go to offer Go to offer at Requesty (opens in a new tab)via Requesty

  • Azure

    $3.44

    Requesty

    in
    $1.25
    out
    $10.00
    Context
    400k

    Prompts may be used for trainingUnited StatesFee 5%: Requesty adds a 5% markup (read on requesty.ai/pricing on Oct 30). Offers are ranked with this fee included.

    Go to offer Go to offer at Requesty (opens in a new tab)via Requesty

  • OpenAI

    $3.44

    OpenRouter

    in
    $1.25
    out
    $10.00
    Context
    400k

    No training on promptsFee 5.5%: OpenRouter adds a 5.5% fee when you buy credits (read on openrouter.ai/pricing on Oct 30). Offers are ranked with this fee included.

    Go to offer Go to offer at OpenRouter (opens in a new tab)via OpenRouter

  • Azure

    $3.44

    OpenRouter

    in
    $1.25
    out
    $10.00
    Context
    400k

    No training on promptsFee 5.5%: OpenRouter adds a 5.5% fee when you buy credits (read on openrouter.ai/pricing on Oct 30). Offers are ranked with this fee included.

    Go to offer Go to offer at OpenRouter (opens in a new tab)via OpenRouter

  • ShengSuanYun

    $3.62

    ShengSuanYun

    in
    $1.32
    out
    $10.52
    Context
    400k

    Training terms not publishedUnverified. No public page for this offer: listed, not designated cheapest

    Seller's site: ShengSuanYun (opens in a new tab)No public price page for this model
Show all 34 offers

3 flex or batch offers hidden (lower priority, variable latency).

Blended = (3 × input + output) / 4, per million tokens. Prices in USD, converted at the ECB rate when the provider bills in another currency.

Method

Monthly cost for your workload

Computed by the API for the three cheapest offers, per 30-day month.
  1. OpenAI$225.00per month
  2. NanoGPT$225.00per month+$0.00 vs the cheapest
  3. NEAR AI$225.00per month+$0.00 vs the cheapest

Compare GPT-5.1 with

Related models

Announced replacement GPT-6 Sol

More from OpenAI

All OpenAI models

Same index family

Use this data

The index is queryable. The API is free to use.
Free API
curl https://api.inferindex.dev/cheapest?model=openai/gpt-5.1
MCP server
claude mcp add --transport http inferindex https://mcp.inferindex.dev/mcp

Also works in Cursor and Codex: see the MCP page.