OpenAI
GPT-5.1
Sharper GPT-5 generation for coding, product work, and tool-assisted tasks
Model facts
- Context window
- 4K tokens
- Maximum output
- 128K tokens
- Cheapest paid input
- $0.625 per 1M tokens
- Cheapest paid output
- $5 per 1M tokens
- Open weights
- no
- Providers
- 35
Capabilities and modalities
reasoning, tool calling, structured output, attachments, temperature control, text, image, audio, pdf.
Artificial Analysis benchmarks
Compare this model on the full LLM benchmark leaderboard.
| Configuration | AAI | Coding | Math | Output tokens/s |
|---|---|---|---|---|
| high | 37.5 | 49.4 | 94.0 | not measured |
| Non-reasoning | 20.7 | not measured | 38.0 | not measured |
Observed price history
- 2026-08-24: $0.625 input / $5 output per 1M tokens
- 2026-08-28: $1.07 input / $8.5 output per 1M tokens
- 2026-09-01: $0.625 input / $5 output per 1M tokens
API providers
- GitLab Duo (Agentic Chat) — model id duo-chat-gpt-5-1; free input / free output per 1M tokens; provider documentation
- OpenRouter (batch) — model id openai/gpt-5.1:batch; $0.625 input / $5 output per 1M tokens; provider documentation
- OpenCode Zen — model id gpt-5.1; $1.07 input / $8.5 output per 1M tokens; provider documentation
- Poe — model id openai/gpt-5.1; $1.1 input / $9 output per 1M tokens; provider documentation
- Jiekou.AI — model id gpt-5.1; $1.12 input / $9 output per 1M tokens; provider documentation
- 302.AI — model id gpt-5.1; $1.25 input / $10 output per 1M tokens; provider documentation
- AIHubMix — model id gpt-5.1; $1.25 input / $10 output per 1M tokens; provider documentation
- Abacus — model id gpt-5.1; $1.25 input / $10 output per 1M tokens; provider documentation
- Azure — model id gpt-5.1; $1.25 input / $10 output per 1M tokens; provider documentation
- Azure Cognitive Services — model id gpt-5.1; $1.25 input / $10 output per 1M tokens; provider documentation
- Cloudflare AI Gateway — model id openai/gpt-5.1; $1.25 input / $10 output per 1M tokens; provider documentation
- Databricks — model id databricks-gpt-5-1; $1.25 input / $10 output per 1M tokens; provider documentation
- DevPass (LLM Gateway) — model id gpt-5.1; $1.25 input / $10 output per 1M tokens; provider documentation
- Eden AI — model id openai/gpt-5.1; $1.25 input / $10 output per 1M tokens; provider documentation
- Helicone (OpenAI) — model id gpt-5.1; $1.25 input / $10 output per 1M tokens; provider documentation
- Impossibl — model id openai/gpt-5.1; $1.25 input / $10 output per 1M tokens; provider documentation
- Kilo Gateway — model id openai/gpt-5.1; $1.25 input / $10 output per 1M tokens; provider documentation
- LLM Gateway (Azure) — model id azure/gpt-5.1; $1.25 input / $10 output per 1M tokens; provider documentation
- LLM Gateway (OpenAI) — model id openai/gpt-5.1; $1.25 input / $10 output per 1M tokens; provider documentation
- Merge Gateway — model id openai/gpt-5.1; $1.25 input / $10 output per 1M tokens; provider documentation
- NEAR AI Cloud — model id openai/gpt-5.1; $1.25 input / $10 output per 1M tokens; provider documentation
- NanoGPT — model id openai/gpt-5.1; $1.25 input / $10 output per 1M tokens; provider documentation
- Neon — model id gpt-5-1; $1.25 input / $10 output per 1M tokens; provider documentation
- Ofox — model id openai/gpt-5.1; $1.25 input / $10 output per 1M tokens; provider documentation
- OpenAI — model id gpt-5.1; $1.25 input / $10 output per 1M tokens; provider documentation
- OpenRouter — model id openai/gpt-5.1; $1.25 input / $10 output per 1M tokens; provider documentation
- OrcaRouter — model id openai/gpt-5.1; $1.25 input / $10 output per 1M tokens; provider documentation
- Perplexity Agent — model id openai/gpt-5.1; $1.25 input / $10 output per 1M tokens; provider documentation
- Pioneer — model id gpt-5.1; $1.25 input / $10 output per 1M tokens; provider documentation
- ZenMux — model id openai/gpt-5.1; $1.25 input / $10 output per 1M tokens; provider documentation
- Cortecs — model id gpt-5.1; $1.38 input / $10.96 output per 1M tokens; provider documentation
- Requesty (EU) — model id gpt-5.1@eu; $1.38 input / $11 output per 1M tokens; provider documentation
- AnyAPI — model id openai/gpt-5.1; not published input / not published output per 1M tokens; provider documentation
- Arena — model id gpt-5.1; not published input / not published output per 1M tokens; provider documentation
- Snowflake Cortex — model id openai-gpt-5.1; not published input / not published output per 1M tokens; provider documentation