OpenAI: GPT-5.1 Chat
Chat-tuned GPT model for conversational assistance, writing, and tool workflows
Cheapest input
$1.25
$/MTok · models.dev
Cheapest output
$10
$/MTok
Context
128K
tokens
Offers
8
2 sources
Offers
Same model, different listings. First-party, router, and aggregator rows stay separate so you can see the spread instead of a single blended number.
| Source | Provider | Input | Output | Cache read | Context |
|---|---|---|---|---|---|
| models.devcheapestopenai/gpt-5.1-chat | Requesty | $1.25 | $10 | $0.125 | 128K |
| models.devopenai/gpt-5.1-chat | ZenMux | $1.25 | $10 | $0.12 | 128K |
| LiteLLMazure/global/gpt-5.1-chat | — | $1.25 | $10 | $0.125 | — |
| LiteLLMglobal/gpt-5.1-chat | — | $1.25 | $10 | $0.125 | — |
| LiteLLMazure/eu/gpt-5.1-chat | — | $1.38 | $11 | $0.14 | — |
| LiteLLMeu/gpt-5.1-chat | — | $1.38 | $11 | $0.14 | — |
| LiteLLMgpt-5.1-chat | — | $1.38 | $11 | $0.14 | — |
| LiteLLMus/gpt-5.1-chat | — | $1.38 | $11 | $0.14 | — |
Capabilities
- Reasoning
- Tool calling
- Structured output
- Attachments
- In: text
- In: image
- In: pdf
- Out: text
Knowledge cutoff: 2024-09-30Released: 2025-11-13Family: gpt-codex