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GPT-5.1 Codex Max benchmark, API pricing, and provider data cover 220 API providers, with prices starting at $0.0062/request. GPT-5.1 Codex Max free API options are available from 3 providers. The page also shows measured API speed and first-token latency.
OpenAI GPT-5.1 Codex Max is a code-specialized variant in the GPT-5 series, optimized for code generation, debugging, and software development tasks.
Observed-capability estimates with uncertainty reported separately from independent benchmark families.
Input and output token limits for this model, plus how it ranks on long-context understanding.
1 metric · Provisional
2 metrics · Estimated
2 metrics · Estimated
5 metrics · Provisional
0 metrics · No data
0 metrics · No data
1 metric · No data
1 metric · Provisional
Third-party OpenRouter endpoint data, shown separately from LMSpeed measurements. Some 30-minute live performance fields only appear after syncing with an OpenRouter API key.
| Provider endpoint | Input | Output | 1d uptime | 30m latency | 30m throughput | Context / output |
|---|---|---|---|---|---|---|
Azure azure | $1.25/M | $10/M | 100% | — | — | 400K tokens / 128K tokens |
OpenAI openai | $1.25/M | $10/M | 88.7% | — | — | 400K tokens / 128K tokens |
OpenAI openai/priority | $2.50/M | $20/M | 88.7% | — | — | 400K tokens / 128K tokens |
Compare GPT-5.1 Codex Max API pricing across 217 providers. Prices range from $0.0062/request to $1078.77/M. Yun API offers the lowest rate at $0.0062/request. 3 providers offer free API credits or a free tier.
| Provider | Health | Model Variant | Group | Input ($/M) | Output ($/M) | Speed (t/s) | First token | Audit |
|---|---|---|---|---|---|---|---|---|
L1 100% | gpt-5.1-codex-max | default | $0.086/M | $0.685/M | — | — | — | |
L1 100% | gpt-5.1-codex-max-2025-12-04 | default | $5.14/M | $41.10/M | — | — | — | |
L1 100% | gpt-5.1-codex-max | default | $0.159/M | $1.27/M | — | — | — | |
L1 100% | gpt-5.1-codex-max-2025-12-04 | default | $9.55/M | $76.44/M | — | — | — | |
L1 100% | gpt-5.1-codex-max | az | $0.257/M Cache read$0.026/MCache write$0.321/MCache write 1h$0.514/M | $2.05/M | — | — | — | |
L1 100% | gpt-5.1-codex-max-2025-12-04 | az | $0.257/M | $2.05/M | — | — | — | |
L1 100% | gpt-5.1-codex-max | default | $0.171/M | $1.37/M | — | — | — | |
L1 100% | gpt-5.1-codex-max-2025-12-04 | default | $10.27/M | $82.19/M | — | — | — | |
L1 100% | gpt-5.1-codex-max | gpt-azure | $1.25/M | $6.25/M | — | — | — | |
L1 100% | gpt-5.1-codex-max-2025-12-04 | gpt-azure | $1.25/M Cache read$0.125/M | $10.00/M | — | — | — | |
L1 100% | gpt-5.1-codex-max | default | $0.021/request | - | — | — | — | |
L1 100% | gpt-5.1-codex-max-2025-12-04 | default | $0.171/M | $1.37/M | — | — | — | |
L1 100% | gpt-5.1-codex-max-xhigh | CodeX_05_token | $0.086/M | $0.685/M | — | — | — | |
L1 100% | gpt-5.1-codex-max | default | $0.086/M | $0.685/M | — | — | — | |
L1 100% | gpt-5.1-codex-max-2025-12-04 | default | $5.14/M | $41.10/M | — | — | — | |
L1 100% | gpt-5.1-codex-max | default | $0.342/M | $2.74/M | — | — | — | |
L1 100% | gpt-5.1-codex-max | default | $0.360/M Cache read$0.036/M | $2.88/M | — | — | — | |
L1 100% | gpt-5.1-codex-max-2025-12-04 | default | $15.41/M | $92.47/M | — | — | — | |
L1 100% | gpt-5.1-codex-max | default | $0.479/M Cache read$0.048/M | $3.84/M | — | — | — | |
L1 100% | gpt-5.1-codex-max-2025-12-04 | default | $20.55/M | $123.29/M | — | — | — |
