Compare
GPT-5.1-Codex-Max vs Grok 4.5
Add, remove, or swap models to compare them side by side.
| Attribute | GPT-5.1-Codex-Max | Grok 4.5 |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 150 | 154 |
| Coding | 67 | 89 |
| Math | — | 84 |
| Reasoning & Knowledge | — | 68 |
| Agentic & Tools | 43 | 74 |
| Specifications | ||
| Developer | OpenAI | xAI |
| Family | GPT | Grok |
| Released | Nov 19, 2025 | Jul 8, 2026 |
| Parameters | — | — |
| Availability | API access | API access |
| Context window | 400K | 500K |
| Price — $/M input | $1.25 | $2.00 |
| Price — $/M output | $10.00 | $6.00 |
| Inputs | text, image | text, image, file |
| Outputs | text | text |
| Benchmarks | ||
| METR task horizon | 2.7 h | — |
| Terminal-Bench | 60% | — |
| AIME 2024/2025 | — | 98% |
| APEX | — | 34% |
| ARC-AGI | — | 87% |
| ARC-AGI-2 | — | 53% |
| GPQA Diamond | — | 93% |
| Humanity's Last Exam | — | 40% |
| SciCode | — | 54% |
| SimpleBench | — | 70% |
| SimpleQA Verified | — | 54% |
| WebDev Arena | — | 1551 |
| WeirdML | — | 46% |
Use-case scores are 0–100 percentile composites across each area’s benchmarks, ranked against every model from the past year. Highlighted cells lead each row. Open a model for the full picture.
Popular comparisons
- Claude Fable 5 vs GPT-5.6 Sol
- GPT-5.6 Sol vs Kimi K3
- Gemini 3.1 Pro vs GPT-5.6 Sol
- GPT-5.6 Sol vs Grok 4.5
- GPT-5.6 Sol vs Qwen 3.7 Max
- GPT-5.6 Sol vs Muse Spark
- GLM-5.2 vs GPT-5.6 Sol
- Claude Fable 5 vs Kimi K3
- Claude Fable 5 vs Gemini 3.1 Pro
- Claude Fable 5 vs Grok 4.5
- Claude Fable 5 vs Qwen 3.7 Max
- Claude Fable 5 vs Muse Spark
- Claude Fable 5 vs GLM-5.2
- Gemini 3.1 Pro vs Kimi K3
- Grok 4.5 vs Kimi K3
- Kimi K3 vs Qwen 3.7 Max
- Kimi K3 vs Muse Spark
- GLM-5.2 vs Kimi K3
- Gemini 3.1 Pro vs Grok 4.5
- Gemini 3.1 Pro vs Qwen 3.7 Max
- Gemini 3.1 Pro vs Muse Spark
- Gemini 3.1 Pro vs GLM-5.2
- Grok 4.5 vs Qwen 3.7 Max
- Grok 4.5 vs Muse Spark
- GLM-5.2 vs Grok 4.5
- Muse Spark vs Qwen 3.7 Max
- GLM-5.2 vs Qwen 3.7 Max
- GLM-5.2 vs Muse Spark
- Claude Fable 5 vs Claude Opus 5
- Kimi K2 vs Kimi K3
- GLM-5 vs GLM-5.2
- GPT-5.5 vs GPT-5.6 Sol
- Kimi K2.5 vs Kimi K3
- GPT-5 vs GPT-5.6 Sol
Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.