Model
GPT-5.1 Codex Max
Coding-optimized GPT model for repository edits, reviews, and agentic software work
7 providersreleased knowledge cutoff 2024-09-30closed weights
$1.10
best input /M · Poe
$9
best output /M
400K
context window
128K
max output
Compare providers (sorted by listed input price)
| Provider | Input /M | Output /M | Cache read /M | Cache write /M | Context | Capabilities | Status | Updated |
|---|---|---|---|---|---|---|---|---|
| Poe openai/gpt-5.1-codex-max | $1.10 | $9 | $0.11 | — | 400K | reasoningtoolsno structuredvision | Dec 8, 2025 | |
| OrcaRouter openai/gpt-5.1-codex-max | $1.25 | $10 | $0.125 | — | 400K | reasoningtoolsstructuredvision | Nov 13, 2025 | |
| OpenRouter openai/gpt-5.1-codex-max | $1.25 | $10 | $0.125 | — | 400K | reasoningtoolsstructuredvision | Nov 13, 2025 | |
| Ofox openai/gpt-5.1-codex-max | $1.25 | $10 | $0.13 | — | 256K | reasoningtoolsstructuredvision | Nov 13, 2025 | |
| Vercel AI Gateway openai/gpt-5.1-codex-max | $1.25 | $10 | $0.125 | — | 400K | reasoningtoolsstructuredvision | Nov 13, 2025 | |
| Kilo Gateway openai/gpt-5.1-codex-max | $1.25 | $10 | $0.125 | — | 400K | reasoningtoolsstructuredvision | Nov 13, 2025 | |
| NanoGPT openai/gpt-5.1-codex-max | $2.50 | $20 | $0.25 | — | 400K | reasoningtoolsstructuredvision | Nov 13, 2025 |
Price badge
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Prices are per million tokens (USD). “—” means the provider does not publicly list a price for this model. Data from models.dev; verify with the provider before purchasing.