OpenAI/ GPT
GPT-5.1 Codex Max
openai/gpt/5-1-codex-max
Coding-optimized GPT model for repository edits, reviews, and agentic software work
Released
2025-11-13
Context window
400K
Max output
128K
Weights
Closed
Modalities
Input
TextImage
Output
Text
Identity
- Version
- gpt-5.1-codex-max
- Knowledge cutoff
- 2024-09-30
- Aliases
- GPT-5.1 Codex Max
Providers
| Provider | Provider model ID | Protocol | Context | Max output | Input | Output | Capabilities | Notes | Pricing | Streaming |
|---|---|---|---|---|---|---|---|---|---|---|
| Poe | openai/gpt-5.1-codex-max | openai_chat | 400K | 128K | TextImage | Text | AttachmentsReasoningTool callStructured | - | input $1.1/M · cache read $0.11/M output $9/M | Yes |
| Vivgrid | gpt-5.1-codex-max | openai_chat | 400K | 128K | TextImage | Text | AttachmentsReasoningTool callStructured | - | input $1.25/M · cache read $0.125/M output $10/M | Yes |
| NanoGPT | openai/gpt-5.1-codex-max | openai_chat | 400K | 128K | TextImage | Text | AttachmentsReasoningTool callStructured | - | input $2.5/M · cache read $0.25/M output $20/M | Yes |
| OpenCode Zen | gpt-5.1-codex-max | openai_chat | 400K | 128K | TextImage | Text | AttachmentsReasoningTool callStructured | - | input $1.25/M · cache read $0.125/M output $10/M | Yes |
| Neon | gpt-5-1-codex-max | openai_chat | 400K | 128K | TextImage | Text | AttachmentsReasoningTool callStructured | - | input $1.25/M · cache read $0.125/M output $10/M | Yes |
| Abacus | gpt-5.1-codex-max | openai_chat | 400K | 128K | TextImage | Text | AttachmentsReasoningTool callStructured | - | input $1.25/M output $10/M | Yes |
| Azure | gpt-5.1-codex-max | openai_responses | 400K | 128K | TextImage | Text | AttachmentsReasoningTool callStructured | - | input $1.25/M · cache read $0.125/M output $10/M | Yes |
| OrcaRouter | openai/gpt-5.1-codex-max | openai_chat | 400K | 128K | TextImage | Text | AttachmentsReasoningTool callStructured | - | input $1.25/M · cache read $0.125/M output $10/M | Yes |
| Requesty | openai/gpt-5.1-codex-max | openai_chat | 400K | 128K | TextImage | Text | AttachmentsReasoningTool callStructured | - | input $1.1/M · cache read $0.11/M output $9/M | Yes |
| Kilo Gateway | openai/gpt-5.1-codex-max | openai_chat | 400K | 128K | TextImage | Text | AttachmentsReasoningTool callStructured | - | input $1.25/M · cache read $0.125/M output $10/M | Yes |
| Vercel AI Gateway | openai/gpt-5.1-codex-max | openai_chat | 400K | 128K | TextImage | Text | AttachmentsReasoningTool callStructured | - | input $1.25/M · cache read $0.125/M output $10/M | Yes |
| OpenRouter | openai/gpt-5.1-codex-max | openai_chat | 400K | 128K | TextImage | Text | AttachmentsReasoningTool callStructured | Default reasoning: medium | input $1.25/M · cache read $0.125/M output $10/M | Yes |
| Jiekou.AI | gpt-5.1-codex-max | openai_chat | 400K | 128K | TextImage | Text | AttachmentsReasoningTool callStructured | - | input $1.125/M output $9/M | Yes |
Capabilities
AttachmentsReasoningTool callStructured
Official price
input $1.25/M · cache read $0.125/M
output $10/M