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GPT-5.1 Chat Latest
openai·openai/gpt-5.1-chat-latest-2·GA·Closed·gpt-codex series
Chat-tuned GPT model for conversational assistance, writing, and tool workflows
At a glance
Reference price$1.25 / $10.00 per 1M
Cache read — · Abacus
Lowest paid$1.25 / $10.00
Merge Gateway Gateway · 1× spread
Context400,000
⚠ Providers report 128,000–400,000; the table below is authoritative
Output limit128,000
Capabilities
✓ Reasoning✓ Tool use✓ Structured outputTemperature✓ Attachments
⚠ Providers report capability flags inconsistently
Modalities
TextImagePDF
Knowledge cutoff2024-09-30
Released / updated2025-11-13 / 2025-11-14
Quality & performance
Artificial Analysis doesn't cover this model (267 of 2059 have data). Quality data comes from independent evals covering widely used models.
Available at 3 providers3 with public prices
| Provider | Tier | Input | Output | Cache read | Cache write | Context | Output limit | Status |
|---|---|---|---|---|---|---|---|---|
| Merge Gateway openai/gpt-5.1-chat-latest | Gateway | $1.25 | $10.00 | $0.125 | — | 128,000 ⚠ | 16,384 | |
| 302.AI gpt-5.1-chat-latest | Gateway | $1.25 | $10.00 | — | — | 128,000 ⚠ | 16,384 | |
| Abacus gpt-5.1-chat-latest | Gateway | $1.25 | $10.00 | — | — | 400,000 | 128,000 |
Sorted by blended price (input×0.75 + output×0.25) asc. The official channel always shows regardless of rank. Whether a gateway's low price is actually usable can't be verified.
Your usage cost
1Merge Gateway$615.00
2302.AI$750.00
3Abacus$750.00
The cheapest paid channel is the only channel.
Benchmark
No upstream benchmark data for this model. For quality, see the Artificial Analysis intelligence score above.
Reasoning control
effort = medium
1 / 3 providers expose no reasoning control (reasoning_options: []).
Related models
GPT-5.3 Codexsame series$1.75 / $14.00GPT-5.3 Codex (OpenAI)same series$1.75 / $14.00GPT-5.3 Codex (Azure)same series$1.75 / $14.00Kimi K2.6cheaper alternative$0.95 / $4.00DeepSeek V4 Procheaper alternative$0.435 / $0.87DeepSeek V4 Flashcheaper alternative$0.14 / $0.28Kimi K2.7 Codecheaper alternative$0.95 / $4.00
Price historyone sample accumulated per data sync
Input listOutput listMin blended