GPT-5.1 Codex Max API Benchmarks, Pricing & Provider Data
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GPT-5.1 Codex Max benchmark, API pricing, and provider data cover 270 API providers, with prices starting at $0.0062/request. GPT-5.1 Codex Max free API options are available from 2 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.
Category Performance
Observed-capability estimates with uncertainty reported separately from independent benchmark families.
- Coverage
- 5 / 8
- Methodology
- V3.0
#1Reasoning54.4Estimated2/4 Measured dimensions
#2Instruction following52.5Provisional1/4 Measured dimensions
#3Coding50.8Estimated2/4 Measured dimensions
#4Knowledge50Provisional1/4 Measured dimensions
#5Agents49.9Provisional1/4 Measured dimensions
Specifications
Input and output token limits for this model, plus how it ranks on long-context understanding.
Features
Rankings
Excels at
Falls behind in
Detailed scores
Updated: Aug 14, 2026Agents
V3.0undefined metric} other undefined metrics}} · Provisional
Score49.980% interval33.9–65.91/4 Measured dimensionsΤ²-bench results83.0#51 / 82
Agents
V3.0undefined metric} other undefined metrics}} · Provisional
Coding
V3.0undefined metric} other undefined metrics}} · Estimated
Score50.880% interval39.0–62.72/4 Measured dimensionsVibe Code Bench22.2#20 / 33AA-SciCode40.2#67 / 108
Coding
V3.0undefined metric} other undefined metrics}} · Estimated
Reasoning
V3.0undefined metric} other undefined metrics}} · Estimated
Score54.480% interval43.6–65.12/4 Measured dimensionsAA-LCR69.0#55 / 100CritPt5.7#38 / 83
Reasoning
V3.0undefined metric} other undefined metrics}} · Estimated
Knowledge
V3.0undefined metric} other undefined metrics}} · Provisional
Score5080% interval34.0–66.01/4 Measured dimensionsArtificial Analysis Intelligence Index35.6#57 / 111AA-GPQA Diamond86.0#49 / 108
Knowledge
V3.0undefined metric} other undefined metrics}} · Provisional
Math
V3.0undefined metric} other undefined metrics}} · No data
No data80% interval30.8–69.20/4 Measured dimensions
Math
V3.0undefined metric} other undefined metrics}} · No data
Multilingual
V3.0undefined metric} other undefined metrics}} · No data
No data80% interval30.8–69.20/4 Measured dimensions
Multilingual
V3.0undefined metric} other undefined metrics}} · No data
Multimodal
V3.0undefined metric} other undefined metrics}} · No data
80% interval30.8–69.20/4 Measured dimensionsAA-MMMU-Pro72.5#43 / 65
Multimodal
V3.0undefined metric} other undefined metrics}} · No data
Instruction following
V3.0undefined metric} other undefined metrics}} · Provisional
Score52.580% interval36.5–68.51/4 Measured dimensionsAA-IFBench70.0#37 / 84
Instruction following
V3.0undefined metric} other undefined metrics}} · Provisional
OpenRouter endpoints
1 endpointsThird-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% | — | — | undefined tokens / undefined tokens |
Pricing Comparison
Compare GPT-5.1 Codex Max API pricing across 268 providers. Prices range from $0.0062/request to $1078.77/M. Yun API offers the lowest rate at $0.0062/request. 2 providers offer free API credits or a free tier.
| Provider | Health | Model Variant | Group | Input ($/M) | Output ($/M) | Speed (t/s) | First token | Audit |
|---|---|---|---|---|---|---|---|---|
L1 100% | gpt-5.1-codex-max | default | $0.086/M Cache read$0.0086/M | $0.685/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 | $0.171/M Cache read$0.017/M | $1.37/M | — | — | — | |
L1 100% | gpt-5.1-codex-max | default | $0.959/M | $7.67/M | — | — | — | |
L1 100% | gpt-5.1-codex-max | default | $1.25/M | $10.00/M | — | — | — | |
L1 100% | gpt-5.1-codex-max-2025-12-04 | default | $75.00/M | $600.00/M | — | — | — | |
兔子API Free | L1 100% | gpt-5.1-codex-max | 原价分组 | Free | Free | — | — | — |
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 | $0.086/M Cache read$0.0086/M | $0.685/M | — | — | — | |
L1 100% | gpt-5.1-codex-max | default | $0.051/M Cache read$0.0051/M | $0.411/M | — | — | — | |
L1 100% | gpt-5.1-codex-max-2025-12-04 | default | $71.92/M | $575.34/M | — | — | — | |
L1 100% | gpt-5.1-codex-max | openai-offical | $1.25/M Cache read$0.125/M | $10.00/M | — | — | — | |
L1 99% | 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 99% | gpt-5.1-codex-max-2025-12-04 | az | $0.257/M | $2.05/M | — | — | — | |
L1 100% | openai/gpt-5.1-codex-max | default | $0.270/M | $2.16/M | — | — | — | |
L1 100% | gpt-5.1-codex-max | default | $0.675/M | $5.40/M | — | — | — | |
L1 100% | gpt-5.1-codex-max | default | $1.88/M | $15.00/M | — | — | — |
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Frequently Asked Questions
- What benchmark data does GPT-5.1 Codex Max include?
- LMSpeed shows GPT-5.1 Codex Max benchmark context, API price, output speed, first-token latency, and provider data across 270 providers when those signals are available.
- What is the GPT-5.1 Codex Max API price?
- GPT-5.1 Codex Max has pricing from 270 providers, ranging from $0.0062/request to $1078.77/M. Yun API has the lowest listed price.
- What does the GPT-5.1 Codex Max API pricing table include?
- The GPT-5.1 Codex Max API pricing table compares 270 providers by input price, output price, free tier status, speed, first-token latency, and recent health data when available.
- Which provider has the cheapest GPT-5.1 Codex Max API pricing?
- Yun API currently has the lowest listed GPT-5.1 Codex Max price at $0.0062/request across 270 providers.
- Can I compare GPT-5.1 Codex Max API price and speed together?
- Yes. LMSpeed shows GPT-5.1 Codex Max API price, output speed, first-token latency, and provider health on the same page so you can compare cost and performance together.
- Is GPT-5.1 Codex Max API free?
- Yes, GPT-5.1 Codex Max free API options are available through 2 providerundefined other undefined} on LMSpeed, including 兔子API, 兔子API. These providers offer free API credits or a free tier with no per-token charges.
- Where can I get GPT-5.1 Codex Max free API access?
- LMSpeed currently lists 2 free API providerundefined other undefined} for GPT-5.1 Codex Max: 兔子API, 兔子API. Check each provider row before using it because free tier limits can change.