GPT-5.2-Codex vs Grok 4.6
GPT-5.2-Codex 
Grok 4.6 Verdict
- Grok 4.6 (medium) leads on quality: 63.9 vs 60.8.
- GPT-5.2-Codex is stronger in agents & tools, instruction following, long context, multimodal.
- Grok 4.6 (medium) is stronger in coding, composite, knowledge, reasoning.
- Grok 4.6 (medium) is 1.6× cheaper ($3.00 vs $4.81 per 1M blended).
- Grok 4.6 (medium) streams 2.1× faster (53 vs 25 tokens per second).
| Metric | GPT-5.2-Codex | Grok 4.6 (medium) |
|---|---|---|
| BenchLeader Index | 60.8 | 63.9 |
| Agents & tools score | 63.5 | – |
| Coding score | 55.7 | 64.1 |
| Composite score | 56.8 | 83.4 |
| Instruction following score | 75.1 | – |
| Knowledge score | 63.1 | 77.5 |
| Long context score | 67.8 | 67.1 |
| Multimodal score | 60.7 | – |
| Reasoning score | – | 62.1 |
| Blended price $/M | $4.81 | $3.00 |
| Output speed | 25 tok/s | 53 tok/s |
| Time to first answer | 6.7 s | 33.4 s |
| Context window | 400k | 500k |
| Terminal-Bench | 66.5% | – |
| SciCode | – | 54.6% |
| APEX-Agents | 27.6% | – |
| LMArena WebDev | 1339 | – |
| LiveBench | 74.0% | – |
| LiveBench Reasoning | 77.7% | – |
| LiveBench Coding | 83.6% | – |
| LiveBench Agentic Coding | 49.4% | – |
| LiveBench Mathematics | 88.8% | – |
| LiveBench Data Analysis | 78.2% | – |
| LiveBench Language | 73.7% | – |
| AA Intelligence Index | 28.5 | 43.0 |
| IFBench | 77.6% | – |
| AA-LCR | 82.3% | 81.0% |
| MMMU-Pro | 76.3% | – |
| AA-Omniscience | -2.2 | 28 |
| Terminal-Bench Hard | 37.1% | – |
| GPQA Diamond (AA) | 89.9% | 93.5% |
| Humanity's Last Exam (AA) | 35.7% | 42.1% |
| SciCode (AA) | – | 55.9% |
| τ²-Bench Telecom (AA) | 92.1% | – |
| LiveCodeBench | 88.0% | – |
| SWE-Bench Pro | 41.0% | – |
| SWE-bench Verified (bash only) | 72.8% | – |
| SWE-bench Verified (any scaffold) | 72.8% | – |
| ARC-AGI-1 | – | 87.5% |
| ARC-AGI-2 | – | 61.3% |
Data as of 2026-09-10. Best configuration of each model; every score links to its source on the model pages.
GPT-5.2-Codex vs Grok 4.6: questions
- Is GPT-5.2-Codex better than Grok 4.6?
- Grok 4.6 (medium) leads on quality: 63.9 vs 60.8. The BenchLeader Index combines every independent quality benchmark; Grok 4.6 (medium) is ahead overall as of 2026-09-10, but check the category scores for your use.
- Is GPT-5.2-Codex better than Grok 4.6 for coding?
- Grok 4.6 scores higher in coding (64 vs 56 on the category index, where 50 is average).
- Which is cheaper, GPT-5.2-Codex or Grok 4.6?
- Grok 4.6 is cheaper: $3.00 against $4.81 per million tokens, blended at three input tokens per output token.
- Which is faster, GPT-5.2-Codex or Grok 4.6?
- Grok 4.6 streams faster: 53 against 25 output tokens per second.
- Which has the larger context window?
- Grok 4.6 accepts more context: 500k against 400k tokens.