GPT-5.1 Codex API Benchmarks, Pricing & Provider Data
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GPT-5.1 Codex benchmark, API pricing, and provider data cover undefined API provider} other undefined API providers}}, with prices starting at $0.0068/request. GPT-5.1 Codex free API options are available from undefined provider} other undefined providers}}.
OpenAI GPT-5.1 Codex 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
- 6 / 8
- Methodology
- V3.0
#1Reasoning54.6RatedGlobal rank #183/4 Measured dimensions
#2Math54.1Provisional1/4 Measured dimensions
#3Instruction following52.6Provisional1/4 Measured dimensions
#4Knowledge49.8Provisional1/4 Measured dimensions
#5Agents49.5Estimated3/4 Measured dimensions
#6Coding49.4Estimated2/4 Measured dimensions
Specifications
Input and output token limits for this model, plus how it ranks on long-context understanding.
Features
Rankings
Excels at
It's decent at
Falls behind in
Detailed scores
Updated: Sep 13, 2026Overall
undefined metric} other undefined metrics}}
Overall score66.0#32 / 112
Overall
undefined metric} other undefined metrics}}
Pricing
undefined metric} other undefined metrics}}
Input price$1.25/M#123 / 186Output price$10.00/M#142 / 186
Pricing
undefined metric} other undefined metrics}}
Agents
V3.0undefined metric} other undefined metrics}} · Estimated
Score49.580% interval40.2–58.73/4 Measured dimensionsΤ²-bench results83.0#51 / 82Gert Labs49.7#23 / 49
Agents
V3.0undefined metric} other undefined metrics}} · Estimated
Coding
V3.0undefined metric} other undefined metrics}} · Estimated
Score49.480% interval38.2–60.52/4 Measured dimensionsLiveCodeBench84.9%#9 / 115Vibe Code Bench13.1#28 / 33
Coding
V3.0undefined metric} other undefined metrics}} · Estimated
Reasoning
V3.0undefined metric} other undefined metrics}} · Rated
Score54.6#1880% interval46.0–63.33/4 Measured dimensionsMMLU-Pro86.0%#23 / 129GPQA86.0%#62 / 218
Reasoning
V3.0undefined metric} other undefined metrics}} · Rated
Knowledge
V3.0undefined metric} other undefined metrics}} · Provisional
Score49.880% interval33.8–65.81/4 Measured dimensionsArtificial Analysis Intelligence Index35.6#36 / 117AA-GPQA Diamond86.0#54 / 113
Knowledge
V3.0undefined metric} other undefined metrics}} · Provisional
Math
V3.0undefined metric} other undefined metrics}} · Provisional
Score54.180% interval38.0–70.31/4 Measured dimensions
Math
V3.0undefined metric} other undefined metrics}} · Provisional
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#45 / 68Design Arena Website1183.0#56 / 78
Multimodal
V3.0undefined metric} other undefined metrics}} · No data
Instruction following
V3.0undefined metric} other undefined metrics}} · Provisional
Score52.680% interval36.6–68.61/4 Measured dimensionsAA-IFBench70.0#36 / 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 API pricing across 286 providers. Prices range from $0.0068/request to $225.00/M. KFCV50 offers the lowest rate at $0.0068/request. 3 providers offer free API credits or a free tier.
| Provider | Health | Model Variant | Group | Input ($/M) | Output ($/M) | Speed (t/s) | First token | Audit |
|---|---|---|---|---|---|---|---|---|
L1 100% | gpt-5.1-codex | default | -93%$0.086/M Cache read$0.0086/M | -93%$0.685/M | — | — | — | |
L1 100% | gpt-5.1-codex | default | $0.014/request | - | — | — | — | |
L1 100% | gpt-5.1-codex-high | default | $0.014/request | - | — | — | — | |
L1 100% | gpt-5.1-codex-medium | default | $0.014/request | - | — | — | — | |
L1 100% | gpt-5.1-codex-2025-11-13 | default | -86%$0.171/M Cache read$0.017/M | -86%$1.37/M | — | — | — | |
L1 100% | gpt-5.1-codex | default | -93%$0.086/M Cache read$0.0086/M | -93%$0.685/M | — | — | — | |
L1 100% | gpt-5.1-codex | default | -23%$0.959/M | -23%$7.67/M | — | — | — | |
L1 100% | gpt-5.1-codex | openai-offical | $1.25/M Cache read$0.125/M | $10.00/M | — | — | — | |
L1 100% | gpt-5.1-codex | AzuerPromo | -97%$0.034/M Cache read$0.0034/M | -97%$0.274/M | — | — | — | |
L1 100% | gpt-5.1-codex-2025-11-13 | AzuerPromo | -97%$0.034/M Cache read$0.0034/M | -97%$0.274/M | — | — | — | |
L1 100% | gpt-5.1-codex | default | -96%$0.051/M Cache read$0.0051/M | -96%$0.411/M | — | — | — | |
L1 100% | gpt-5.1-codex-2025-11-13 | default | -96%$0.051/M | -96%$0.411/M | — | — | — | |
L1 100% | gpt-5.1-codex | Azure-Gpt-4 | -93%$0.082/M Cache read$0.0082/M | -93%$0.654/M | — | — | — | |
L1 100% | gpt-5.1-codex | Chat | -93%$0.086/M Cache read$0.0086/M | -93%$0.685/M | — | — | — | |
L1 100% | gpt-5.1-codex | default | -73%$0.342/M | -73%$2.74/M | — | — | — | |
L1 100% | gpt-5.1-codex-2025-11-13 | gpt-azure | $1.25/M Cache read$0.125/M | $10.00/M | — | — | — | |
L1 100% | gpt-5.1-codex | gpt-azure | $1.25/M | -37%$6.25/M | — | — | — | |
L1 100% | gpt-5.1-codex-high | gpt-azure4 | $2.00/M | $10.00/M | — | — | — | |
L1 100% | gpt-5.1-codex-medium | gpt-azure4 | $2.00/M | $10.00/M | — | — | — | |
L1 100% | gpt-5.1-codex | default | -78%$0.270/M | -78%$2.16/M | — | — | — |
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Frequently Asked Questions
- What benchmark data does GPT-5.1 Codex include?
- LMSpeed shows GPT-5.1 Codex benchmark context, API price, output speed, first-token latency, and provider data across 289 providers when those signals are available.
- What is the GPT-5.1 Codex API price?
- GPT-5.1 Codex has pricing from undefined provider} other undefined providers}}, ranging from $0.0068/request to $225.00/M. KFCV50 has the lowest listed price.
- What does the GPT-5.1 Codex API pricing table include?
- The GPT-5.1 Codex API pricing table compares 289 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 API pricing?
- KFCV50 currently has the lowest listed GPT-5.1 Codex price at $0.0068/request across undefined provider} other undefined providers}}.
- Is GPT-5.1 Codex API free?
- Yes, GPT-5.1 Codex free API options are available through 3 providerundefined other undefined} on LMSpeed, including 兔子API, 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 free API access?
- LMSpeed currently lists 3 free API providerundefined other undefined} for GPT-5.1 Codex: 兔子API, 兔子API, 兔子API. Check each provider row before using it because free tier limits can change.