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ModelsOpenAIGPT-3.5 Turbo

GPT-3.5 Turbo

Retired: The model's withdrawal, announced by its lab or by every seller listing it · Retired Oct 23, 2026 · announced on developers.openai.com · read on Oct 31, 2026 · announced replacement: GPT-5.6 Terra (opens in a new tab)
openai/gpt-3.5-turbo Compare →
Offers
3
Providers
3

Cheapest right now

No offer is selected as the cheapest right now: each of the lowest prices listed below says why on its row.

See the 3 offers

Cheapest, no training on prompts

No offer with a published no-training policy for this model.

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$0.75, Azure$0.75
2026-10-03$0.75, Azure$0.75
2026-10-04$0.75, Azure$0.75
2026-10-05$0.75, Azure$0.75
2026-10-06$0.75, OpenAI$0.75
2026-10-07$0.75, OpenAI$0.75
2026-10-08$0.75, OpenAI$0.75
2026-10-09$0.75, OpenAI$0.75
2026-10-10$0.75, OpenAI$0.75
2026-10-11$0.75, OpenAI$0.75
2026-10-12$0.75, OpenAI$0.75
2026-10-13$0.75, OpenAI$0.75
2026-10-14$0.75, OpenAI$0.75
2026-10-15$0.75, OpenAI$0.75
2026-10-16$0.75, OpenAI$0.75
2026-10-17$0.75, OpenAI$0.75
2026-10-18$0.75, OpenAI$0.75
2026-10-19$0.75, OpenAI$0.75
2026-10-20$0.75, OpenAI$0.75
2026-10-21$0.75, OpenAI$0.75
2026-10-22$0.75, OpenAI$0.75
2026-10-23$0.75, OpenAI$0.75
2026-10-25$0.75, NanoGPT$0.75
2026-10-26$0.75, NanoGPT$0.75

Cheapest offerOfficial list price

Offers

3 of 3 offers

Offers for GPT-3.5 Turbo, 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 0.50 1.50 0.75 –
See pricing at OpenAI (opens in a new tab)
2 FastRouter 0.50 1.50 0.75 16k Unverified. Withdrawn by its lab; this seller has not shown it for sale for 72 hours: listed, not designated cheapest
Go to offer at FastRouter (opens in a new tab)
3 OrcaRouter 0.50 1.50 0.75 16k Unverified. Withdrawn by its lab; this seller has not shown it for sale for 72 hours: listed, not designated cheapest
Go to offer at OrcaRouter (opens in a new tab)

No training on promptsTraining terms not published

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

  • OpenAI

    $0.75

    OpenAI

    in
    $0.50
    out
    $1.50
    Context
    –

    No training on prompts

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

  • FastRouter

    $0.75

    FastRouter

    in
    $0.50
    out
    $1.50
    Context
    16k

    Training terms not publishedUnverified. Withdrawn by its lab; this seller has not shown it for sale 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

  • OrcaRouter

    $0.75

    OrcaRouter

    in
    $0.50
    out
    $1.50
    Context
    16k

    Training terms not publishedUnverified. Withdrawn by its lab; this seller has not shown it for sale 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

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

Method

Related models

Announced replacement GPT-5.6 Terra

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-3.5-turbo
MCP server
claude mcp add --transport http inferindex https://mcp.inferindex.dev/mcp

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