OpenAI: GPT-5.1 Codex Max
Coding-optimized GPT model for repository edits, reviews, and agentic software work
Cheapest input
$1.10
$/MTok · models.dev
Cheapest output
$9
$/MTok
Context
400K
tokens
Offers
15
3 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-codex-max | Poe | $1.10 | $9 | $0.11 | 400K |
| models.devopenai/gpt-5.1-codex-max | Requesty | $1.10 | $9 | $0.11 | 400K |
| models.devgpt-5.1-codex-max | Jiekou.AI | $1.13 | $9 | $0 | 400K |
| models.devopenai/gpt-5.1-codex-max | Kilo Gateway | $1.25 | $10 | $0.125 | 400K |
| OpenRouteropenai/gpt-5.1-codex-max | OpenRouter | $1.25 | $10 | $0.125 | 400K |
| models.devopenai/gpt-5.1-codex-max | OrcaRouter | $1.25 | $10 | $0.125 | 400K |
| models.devopenai/gpt-5.1-codex-max | Vercel AI Gateway | $1.25 | $10 | $0.125 | 400K |
| models.devgpt-5.1-codex-max | Abacus | $1.25 | $10 | $0 | 400K |
| models.devgpt-5.1-codex-max | Azure | $1.25 | $10 | $0.125 | 400K |
| models.devgpt-5-1-codex-max | Neon | $1.25 | $10 | $0.125 | 400K |
| models.devgpt-5.1-codex-max | OpenCode Zen | $1.25 | $10 | $0.125 | 400K |
| models.devgpt-5.1-codex-max | Vivgrid | $1.25 | $10 | $0.125 | 400K |
| LiteLLMopenai/gpt-5.1-codex-max | — | $1.25 | $10 | $0.125 | — |
| LiteLLMgpt-5.1-codex-max | — | $1.25 | $10 | $0.125 | — |
| models.devopenai/gpt-5.1-codex-max | NanoGPT | $2.50 | $20 | $0 | 400K |
Capabilities
- Reasoning
- Tool calling
- Structured output
- Attachments
- In: text
- In: image
- In: pdf
- Out: text
- Out: image
Knowledge cutoff: 2024-09-30Released: 2025-11-13Family: gpt-codex