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ModelsOpenAIGPT-5.5 Pro

GPT-5.5 Pro

openai/gpt-5.5-pro1.1M 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.
$67.50
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.
$67.50
Offers
13
Providers
8

Cheapest right now

OpenAI

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

1.1M

$67.50 blended / 1M tokens

No change7D
in
$30.00
out
$180.00
Cached input
–

prompt up to 272K tokens: up to 272K: $30.00 / $180.00; above that: $60.00 / $270.00 (Input / Output, per million tokens)

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

GPT-5.5 Pro costs from $67.50 per million tokens (at a 3:1 input:output mix): the lowest current price, at 3 providers, checked on ; 13 offers are listed.

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$67.50, FastRouter$67.50
2026-10-03$67.50, FastRouter$67.50
2026-10-04$67.50, FastRouter$67.50
2026-10-05$67.50, FastRouter$67.50
2026-10-06$67.50, OpenAI$67.50
2026-10-07$67.50, OpenAI$67.50
2026-10-08$67.50, OpenAI$67.50
2026-10-09$67.50, OpenAI$67.50
2026-10-10$67.50, OpenAI$67.50
2026-10-11$67.50, OpenAI$67.50
2026-10-12$67.50, OpenAI$67.50
2026-10-13$67.50, OpenAI$67.50
2026-10-14$67.50, OpenAI$67.50
2026-10-15$67.50, OpenAI$67.50
2026-10-16$67.50, OpenAI$67.50
2026-10-17$67.50, OpenAI$67.50
2026-10-18$67.50, OpenAI$67.50
2026-10-19$67.50, OpenAI$67.50
2026-10-20$67.50, OpenAI$67.50
2026-10-21$67.50, OpenAI$67.50
2026-10-22$67.50, OpenAI$67.50
2026-10-23$67.50, OpenAI$67.50
2026-10-24$67.50, OpenAI$67.50
2026-10-25$67.50, OpenAI$67.50
2026-10-26$67.50, OpenAI$67.50
2026-10-27$67.50, OpenAI$67.50
2026-10-28$67.50, OpenAI$67.50
2026-10-29$67.50, OpenAI$67.50
2026-10-30$67.50, OpenAI$67.50
2026-10-31$67.50, OpenAI$67.50

Cheapest offerOfficial list price

Offers

13 of 13 offers

Offers for GPT-5.5 Pro, 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 OpenAI 30.00 180.00 67.50 – prompt up to 272K tokens: up to 272K: $30.00 / $180.00; above that: $60.00 / $270.00 (Input / Output, per million tokens)
See pricing at OpenAI (opens in a new tab)
2 OpenAIvia Eden AI 30.00 180.00 67.50 1.1M 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
3 OpenAIvia Kilo Gateway 30.00 180.00 67.50 1.1M Unverified. No public page for this offer: listed, not designated cheapest
: Kilo Gateway (opens in a new tab). No public price page for this model
4 FastRouter 30.00 180.00 67.50 1.1M 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)
5 Glama 30.00 180.00 67.50 1.1M Unverified. No public page for this offer: listed, not designated cheapest
: Glama (opens in a new tab). No public price page for this model
6 Martian 30.00 180.00 67.50 – 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)
7 Nous Portal 30.00 180.00 67.50 1.1M 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)
8 OrcaRouter 30.00 180.00 67.50 – 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)
9 Vercel AI Gateway 30.00 180.00 67.50 –
Go to offer at Vercel AI Gateway (opens in a new tab)
10 ZenMux 30.00 180.00 67.50 1.1M prompt up to 272K (271,999) tokens: up to 272K (271,999): $30.00 / $180.00; above that: $60.00 / $270.00 (Input / Output, per million tokens)
Go to offer at ZenMux (opens in a new tab)
11 OpenAIvia LLM Gateway 30.00 180.00 67.50 – 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 31). Offers are ranked with the 5% included.
Go to offer at LLM Gateway (opens in a new tab)
12 OpenAIvia Requesty 30.00 180.00 67.50 1.1M Fee 5%: Requesty adds a 5% markup (read on requesty.ai/pricing on Oct 31). Offers are ranked with this fee included.
Go to offer at Requesty (opens in a new tab)
13 OpenAIvia OpenRouter 30.00 180.00 67.50 1.1M Fee 5.5%: OpenRouter adds a 5.5% fee when you buy credits (read on openrouter.ai/pricing on Oct 31). Offers are ranked with this fee included.prompt up to 272K tokens: up to 272K: $30.00 / $180.00; above that: $60.00 / $270.00 (Input / Output, per million tokens)
Go to offer at OpenRouter (opens in a new tab)

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.

  • OpenAI

    $67.50

    OpenAI

    in
    $30.00
    out
    $180.00
    Context
    –

    No training on promptsprompt up to 272K tokens: up to 272K: $30.00 / $180.00; above that: $60.00 / $270.00 (Input / Output, per million tokens)

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

  • OpenAI

    $67.50

    Eden AI

    in
    $30.00
    out
    $180.00
    Context
    1.1M

    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

    $67.50

    Kilo Gateway

    in
    $30.00
    out
    $180.00
    Context
    1.1M

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

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

  • FastRouter

    $67.50

    FastRouter

    in
    $30.00
    out
    $180.00
    Context
    1.1M

    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

    $67.50

    Glama

    in
    $30.00
    out
    $180.00
    Context
    1.1M

    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

    $67.50

    Martian

    in
    $30.00
    out
    $180.00
    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

    $67.50

    Nous Portal

    in
    $30.00
    out
    $180.00
    Context
    1.1M

    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

    $67.50

    OrcaRouter

    in
    $30.00
    out
    $180.00
    Context
    –

    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

  • Vercel AI Gateway

    $67.50

    Vercel AI Gateway

    in
    $30.00
    out
    $180.00
    Context
    –

    No training on prompts

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

  • ZenMux

    $67.50

    ZenMux

    in
    $30.00
    out
    $180.00
    Context
    1.1M

    Prompts may be used for trainingprompt up to 272K (271,999) tokens: up to 272K (271,999): $30.00 / $180.00; above that: $60.00 / $270.00 (Input / Output, per million tokens)

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

  • OpenAI

    $67.50

    LLM Gateway

    in
    $30.00
    out
    $180.00
    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 31). 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

    $67.50

    Requesty

    in
    $30.00
    out
    $180.00
    Context
    1.1M

    Prompts may be used for trainingFee 5%: Requesty adds a 5% markup (read on requesty.ai/pricing on Oct 31). Offers are ranked with this fee included.

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

  • OpenAI

    $67.50

    OpenRouter

    in
    $30.00
    out
    $180.00
    Context
    1.1M

    No training on promptsFee 5.5%: OpenRouter adds a 5.5% fee when you buy credits (read on openrouter.ai/pricing on Oct 31). Offers are ranked with this fee included.prompt up to 272K tokens: up to 272K: $30.00 / $180.00; above that: $60.00 / $270.00 (Input / Output, per million tokens)

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

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$4,500.00per month
  2. Vercel AI Gateway$4,500.00per month+$0.00 vs the cheapest
  3. ZenMux$4,500.00per month+$0.00 vs the cheapest

Compare GPT-5.5 Pro with

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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-5.5-pro
MCP server
claude mcp add --transport http inferindex https://mcp.inferindex.dev/mcp

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