This model was retired on 2026-06-29. The pricing below is the last-known rate, kept for migration reference.
Context
128K
Max output
128K
Serving providers
2
Cheapest input
$1.25 /1M
Prices are on-demand list rates. Enterprise commitments (committed-use discounts, provisioned throughput, negotiated rates) can be materially lower.
Pricing by serving provider
last-known · per 1M tokens · click a provider to expand| Serving provider | Input /1M | Output /1M | Endpoints | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Azure | $1.25 | $10.00 | 1 | |||||||||||||||||||||
| ||||||||||||||||||||||||
| OpenRouter | $1.25 | $10.00 | 1 | |||||||||||||||||||||
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Price history
input + output $/1M since we started tracking Input Output
Cost calculator
estimate your monthly spend on this model$1,050
estimated / month
Model IDs
copy the exact identifier for your platformazure/global/gpt-5.1-chatopenai/gpt-5.1-chat
Frequently asked questions
GPT 5.1 Chat pricing, context and availabilityIs GPT 5.1 Chat still available?
GPT 5.1 Chat was retired on 2026-06-29. The pricing on this page is the last-known rate, kept for migration reference.
How much did GPT 5.1 Chat cost?
GPT 5.1 Chat's last-known pricing, before it was retired on 2026-06-29, was $1.25 per 1M input tokens and $10.00 per 1M output tokens.
What was the context window of GPT 5.1 Chat?
GPT 5.1 Chat had a 128K token context window and could return up to 128K output tokens.
What could GPT 5.1 Chat do?
GPT 5.1 Chat supported image input (vision), tool use, reasoning, prompt caching and structured output.
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