Data points: 111
Model compare
The readout for Claude Opus 4.6 and GPT-5.1 Codex Max, before the detailed comparison sheet.
Weighted outcome: GPT-5.1 Codex Max. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
GPT-5.1 Codex Max
GPT-5.1 Codex Max has the higher weighted result; Model A / B score 38.9 to 61.1.
Evidence depth
111 data points
Includes 21 benchmark rows, 1 audit samples, and 7 provider examples.
Selection signal
Start with GPT-5.1 Codex Max
The charts below split 29 high-signal samples across speed, scores, and audit health.
Switch either side of this report to compare another model with the same LMSpeed data pipeline.
Select a different model to open a new comparison URL.
This report only uses LMSpeed data for Claude Opus 4.6 and GPT-5.1 Codex Max: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | Claude Opus 4.6 | GPT-5.1 Codex Max |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 38.9 pts | 61.1 pts |
| Benchmark category leads | 2 categories | 5 categories |
| Operational advantages | Cheapest input price, First-token latency, Free providers, Provider coverage | Average speed |
| Context window | 1M tokens | 400K tokens |
| Max output | 128K tokens | 128K tokens |
| Modalities | Input TextImageFile Output Text |
The overall result weights benchmark capability categories at 80% and price, API speed/latency, and availability at 20%. Recent test volume does not affect the winner, and missing benchmark categories are excluded.
| Model compare | Claude Opus 4.6 | GPT-5.1 Codex Max |
|---|---|---|
| Developer | Anthropic | OpenAI |
| Released | Feb 2026 | Dec 2025 |
| Parameters | No data | No data |
| Tokenizer | Claude | GPT |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | anthropic/claude-opus-4.6 | openai/gpt-5.1-codex-max |
| References | No data | No data |
This report only uses LMSpeed data for Claude Opus 4.6 and GPT-5.1 Codex Max: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
Claude Opus 4.6
Claude Opus 4.6 is stronger in benchmark categories (Agents, Coding) and operational dimensions (Cheapest input price, First-token latency, Free providers, Provider coverage).
GPT-5.1 Codex Max
GPT-5.1 Codex Max is stronger in benchmark categories (Reasoning, Knowledge, Multilingual, Multimodal, Instruction following) and operational dimensions (Average speed).
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
Compare benchmark category scores on a 0-100 scale. Select a category to inspect the gap.
Avg. score
Claude Opus 4.6
53.6
Avg. score
GPT-5.1 Codex Max
55.5
Claude Opus 4.6 leads by 5.2
Claude Opus 4.6 leads by 7.6
GPT-5.1 Codex Max leads by 1.9
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Claude Opus 4.6
winner84.0
Rank #6/127 · confidence 4 · eval date 2026-02-01
GPT-5.1 Codex Max
71.0
Rank #29/127 · confidence 1 · eval date 2025-11-19
Claude Opus 4.6
winner87.8
Rank #2/70 · confidence 4 · eval date 2026-02-01
GPT-5.1 Codex Max
83.0
Rank #5/70 · confidence 1 · eval date 2025-11-19
Claude Opus 4.6
58.3
Rank #62/89 · confidence 4 · eval date 2026-02-01
GPT-5.1 Codex Max
winner67.3
Rank #30/89 · confidence 1 · eval date 2025-11-19
Claude Opus 4.6
2.8
Rank #43/73 · confidence 4 · eval date 2026-02-01
GPT-5.1 Codex Max
winner5.7
Rank #30/73 · confidence 1 · eval date 2025-11-19
Claude Opus 4.6
winner57.6
Rank #5/33 · confidence 4 · eval date 2026-02-01
GPT-5.1 Codex Max
22.2
Rank #20/33 · confidence 1 · eval date 2025-11-19
Claude Opus 4.6
winner85.8
Rank #7/100 · confidence 4 · eval date 2026-02-01
GPT-5.1 Codex Max
77.6
Rank #17/100 · confidence 1 · eval date 2025-11-19
Claude Opus 4.6
winner48.5
Rank #14/85 · confidence 4 · eval date 2026-02-01
GPT-5.1 Codex Max
34.8
Rank #40/85 · confidence 1 · eval date 2025-11-19
Claude Opus 4.6
winner45.7
Rank #37/96 · confidence 4 · eval date 2026-02-01
GPT-5.1 Codex Max
40.2
Rank #56/96 · confidence 1 · eval date 2025-11-19
Claude Opus 4.6
winner91.5
Rank #2/92 · confidence 4 · eval date 2026-02-01
GPT-5.1 Codex Max
73.6
Rank #26/92 · confidence 1 · eval date 2025-11-19
Claude Opus 4.6
winner45.2
Rank #15/90 · confidence 4 · eval date 2026-02-01
GPT-5.1 Codex Max
39.2
Rank #23/90 · confidence 1 · eval date 2025-11-19
Claude Opus 4.6
winner37.8
Rank #39/99 · confidence 4 · eval date 2026-02-01
GPT-5.1 Codex Max
34.7
Rank #46/99 · confidence 1 · eval date 2025-11-19
Claude Opus 4.6
84.0
Rank #52/96 · confidence 4 · eval date 2026-02-01
GPT-5.1 Codex Max
winner86.0
Rank #40/96 · confidence 1 · eval date 2025-11-19
Claude Opus 4.6
18.6
Rank #56/96 · confidence 4 · eval date 2026-02-01
GPT-5.1 Codex Max
winner23.4
Rank #45/96 · confidence 1 · eval date 2025-11-19
Claude Opus 4.6
winner76.0
Rank #45/90 · confidence 4 · eval date 2026-02-01
GPT-5.1 Codex Max
74.4
Rank #48/90 · confidence 1 · eval date 2025-11-19
Claude Opus 4.6
winner100.0
Rank #1/62 · confidence 4 · eval date 2026-02-01
GPT-5.1 Codex Max
84.0
Rank #8/62 · confidence 1 · eval date 2025-11-19
Claude Opus 4.6
75.4
Rank #17/81 · confidence 4 · eval date 2026-02-01
GPT-5.1 Codex Max
winner86.5
Rank #6/81 · confidence 1 · eval date 2025-11-19
Claude Opus 4.6
72.5
Rank #36/57 · confidence 4 · eval date 2026-02-01
GPT-5.1 Codex Max
72.5
Rank #36/57 · confidence 1 · eval date 2025-11-19
Claude Opus 4.6
winner91.3
Rank #3/75 · confidence 4 · eval date 2026-02-01
GPT-5.1 Codex Max
82.0
Rank #15/75 · confidence 1 · eval date 2025-11-19
Claude Opus 4.6
44.6
Rank #61/86 · confidence 4 · eval date 2026-02-01
GPT-5.1 Codex Max
winner70.0
Rank #39/86 · confidence 1 · eval date 2025-11-19
Claude Opus 4.6
winner79.1
Rank #19/95 · confidence 4 · eval date 2026-02-01
GPT-5.1 Codex Max
74.6
Rank #24/95 · confidence 1 · eval date 2025-11-19
Claude Opus 4.6
winner84.8
Rank #44/84 · confidence 4 · eval date 2026-02-01
GPT-5.1 Codex Max
83.0
Rank #50/84 · confidence 1 · eval date 2025-11-19
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Claude Opus 4.6 | GPT-5.1 Codex Max |
|---|---|---|
Winner: Claude Opus 4.6 | Claude Opus 4.6 claude-opus-4-6 Audit score 97 10010010088 | GPT-5.1 Codex Max gpt-5.1-codex-max No audit yet |
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | Claude Opus 4.6 | GPT-5.1 Codex Max |
|---|---|---|
20 tests | Claude Opus 4.6 speed / latency 42 tok/s / 2282ms input / output No data | GPT-5.1 Codex Max speed / latency N/A / N/A input / output No data |
15 tests | Claude Opus 4.6 speed / latency 57 tok/s / 3926ms input / output No data | GPT-5.1 Codex Max speed / latency N/A / N/A input / output No data |
7 tests | Claude Opus 4.6 speed / latency 39 tok/s / 9397ms input / output No data | GPT-5.1 Codex Max speed / latency N/A / N/A input / output No data |
5 tests | Claude Opus 4.6 speed / latency 26 tok/s / 1130ms input / output No data | GPT-5.1 Codex Max speed / latency N/A / N/A input / output No data |
5 tests | Claude Opus 4.6 speed / latency 43 tok/s / 2285ms input / output No data | GPT-5.1 Codex Max speed / latency N/A / N/A input / output No data |
Claude Opus 4.6 claude-opus-4-6 speed / latency No data input / output $0/request | GPT-5.1 Codex Max gpt-5.1-codex-max-2025-12-04 speed / latency No data input / output $0/request | |
Claude Opus 4.6 claude-opus-4-6-c speed / latency No data input / output $0.0082/request | GPT-5.1 Codex Max gpt-5.1-codex-max speed / latency No data input / output $1.16/M |
Weighted outcome: GPT-5.1 Codex Max. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Input
Output
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputText outputTool callingStructured outputsJSON modeReasoning |
|---|
GPT-5.1 Codex Max leads by 1.3
Claude Opus 4.6
GPT-5.1 Codex Max leads by 3.8
GPT-5.1 Codex Max leads by 14.2
GPT-5.1 Codex Max leads by 8.2
