GPT-5 vs GPT-6 Astra
GPT-5 Verdict
- GPT-6 Astra (max) leads on quality: 70.9 vs 59.9.
- GPT-5 is stronger in human preference, instruction following, long context, multimodal.
- GPT-6 Astra (max) is stronger in agents & tools, coding, composite, knowledge, reasoning, maths.
- GPT-5 is 5.8× cheaper ($3.44 vs $20.00 per 1M blended).
- GPT-5 streams 2.6× faster (70 vs 27 tokens per second).
| Metric | GPT-5 | GPT-6 Astra (max) |
|---|---|---|
| BenchLeader Index | 59.9 | 70.9 |
| Agents & tools score | 51.0 | 68.2 |
| Coding score | 61.0 | 78.6 |
| Composite score | 58.0 | 72.9 |
| Human preference score | 61.8 | – |
| Instruction following score | 67.7 | – |
| Knowledge score | 62.2 | 80.0 |
| Long context score | 65.6 | – |
| Multimodal score | 59.6 | – |
| Reasoning score | 64.2 | 73.6 |
| Maths score | – | 77.2 |
| Blended price $/M | $3.44 | $20.00 |
| Output speed | 70 tok/s | 27 tok/s |
| Time to first answer | 77.2 s | 337.3 s |
| Context window | 400k | 1.1M |
| GPQA Diamond | – | 95.8% |
| FrontierMath Tiers 1–3 | – | 93.7% |
| FrontierMath Tier 4 | – | 97.6% |
| OTIS Mock AIME | – | 100.0% |
| SimpleQA Verified | – | 75.6% |
| Terminal-Bench | 49.6% | 58.2% |
| SciCode | 42.9% | 56.5% |
| Remote Labor Index | 1.7% | – |
| WeirdML | 39.8% | – |
| APEX-Agents | 18.3% | – |
| FrontierCode | – | 53.3% |
| Epoch Capabilities Index | 150 | – |
| LMArena Text | 1427 | – |
| LMArena Hard Prompts | 1449 | – |
| LMArena Coding | 1463 | – |
| LMArena WebDev | – | 1796 |
| LMArena Vision | 1232 | – |
| LMArena Agent | – | 12.5 |
| LiveBench | – | 82.2% |
| LiveBench Reasoning | – | 92.7% |
| LiveBench Coding | – | 80.4% |
| LiveBench Agentic Coding | – | 57.3% |
| LiveBench Mathematics | – | 96.8% |
| LiveBench Data Analysis | – | 83.0% |
| LiveBench Language | – | 89.4% |
| AA Intelligence Index | 23.0 | – |
| IFBench | 73.1% | – |
| AA-LCR | 78.2% | – |
| MMMU-Pro | 74.2% | – |
| AA-Omniscience | -8.7 | – |
| Terminal-Bench Hard | 32.6% | – |
| GPQA Diamond (AA) | 85.3% | – |
| Humanity's Last Exam (AA) | 28.5% | – |
| τ²-Bench Telecom (AA) | 84.8% | – |
| Terminal-Bench 2.1 (Vals) | – | 87.3% |
| Vals Index | – | 66.6 |
| PRBench Finance | 51.3% | – |
| PRBench Legal | 49.0% | – |
| VISTA | 49.7% | – |
| MultiNRC | 52.1% | – |
| TutorBench | 55.3% | – |
| Kagi LLM Benchmark | 72.7% | – |
| Aider Polyglot | 88.0% | – |
| SWE-bench Verified (any scaffold) | 75.6% | – |
| ARC-AGI-1 | – | 97.5% |
| ARC-AGI-2 | – | 95.0% |
| ARC-AGI-3 | – | 98.6% |
Data as of 2026-09-10. Best configuration of each model; every score links to its source on the model pages.
GPT-5 vs GPT-6 Astra: questions
- Is GPT-5 better than GPT-6 Astra?
- GPT-6 Astra (max) leads on quality: 70.9 vs 59.9. The BenchLeader Index combines every independent quality benchmark; GPT-6 Astra (max) is ahead overall as of 2026-09-10, but check the category scores for your use.
- Is GPT-5 better than GPT-6 Astra for coding?
- GPT-6 Astra scores higher in coding (79 vs 61 on the category index, where 50 is average).
- Is GPT-5 better than GPT-6 Astra for agentic tasks?
- GPT-6 Astra scores higher in agentic tasks (68 vs 51 on the category index, where 50 is average).
- Which is cheaper, GPT-5 or GPT-6 Astra?
- GPT-5 is cheaper: $3.44 against $20.00 per million tokens, blended at three input tokens per output token.
- Which is faster, GPT-5 or GPT-6 Astra?
- GPT-5 streams faster: 70 against 27 output tokens per second.
- Which has the larger context window?
- GPT-6 Astra accepts more context: 1.1M against 400k tokens.