GPT-5.4 vs o3
GPT-5.4 Verdict
- GPT-5.4 leads on quality: 63.5 vs 61.6.
- GPT-5.4 is stronger in composite, human preference, instruction following, knowledge, long context, multimodal, reasoning.
- o3 is stronger in agents & tools, coding, maths.
- o3 is 1.6× cheaper ($3.50 vs $5.63 per 1M blended).
| Metric | GPT-5.4 | o3 |
|---|---|---|
| BenchLeader Index | 63.5 | 61.6 |
| Agents & tools score | 66.2 | 70.3 |
| Coding score | 51.6 | 62.0 |
| Composite score | 78.4 | 54.5 |
| Human preference score | 64.7 | 62.3 |
| Instruction following score | 71.9 | 65.0 |
| Knowledge score | 67.0 | 58.0 |
| Long context score | 67.6 | 63.8 |
| Multimodal score | 64.0 | 57.9 |
| Reasoning score | 62.6 | 61.5 |
| Maths score | – | 78.6 |
| Blended price $/M | $5.63 | $3.50 |
| Output speed | 132 tok/s | 107 tok/s |
| Time to first answer | 102.0 s | 6.3 s |
| Context window | 1.1M | 200k |
| Terminal-Bench | 81.8% | – |
| APEX-Agents | 34.9% | – |
| Epoch Capabilities Index | 156.9 | 146.9 |
| LMArena Text | 1466 | 1432 |
| LMArena Hard Prompts | 1488 | 1441 |
| LMArena Coding | 1513 | 1460 |
| LMArena WebDev | 1387 | – |
| LMArena Vision | 1293 | 1214 |
| AA Intelligence Index | 39.0 | 20.2 |
| IFBench | 74.0% | 71.4% |
| AA-LCR | 82.0% | 74.7% |
| MMMU-Pro | 78.4% | 70.1% |
| AA-Omniscience | 5.8 | -15.6 |
| Terminal-Bench Hard | 57.6% | 37.1% |
| GPQA Diamond (AA) | 92.0% | 82.7% |
| Humanity's Last Exam (AA) | 43.7% | 20.1% |
| τ²-Bench Telecom (AA) | 87.1% | 80.7% |
| PRBench Finance | – | 47.7% |
| PRBench Legal | – | 48.6% |
| HiL-Bench | 9.7% | – |
| EQ-Bench 4 | 1272 | – |
| MMMU (validation) | – | 82.9% |
| MMMU-Pro (official) | – | 76.4% |
| Kagi LLM Benchmark | 63.8% | 67.6% |
| IFEval (HELM) | – | 86.9% |
| Omni-MATH (HELM) | – | 71.4% |
| WildBench (HELM) | – | 86.1% |
| MMLU-Pro (HELM) | – | 85.9% |
| GPQA Diamond (HELM) | – | 75.3% |
| HELM Capabilities mean | – | 81.1% |
| Aider Polyglot | – | 81.3% |
| SWE-bench Verified (bash only) | – | 58.4% |
| SWE-bench Verified (any scaffold) | – | 58.4% |
| BFCL Overall | – | 63.0% |
Data as of 2026-09-12. Best configuration of each model; every score links to its source on the model pages.
GPT-5.4 vs o3: questions
- Is GPT-5.4 better than o3?
- GPT-5.4 leads on quality: 63.5 vs 61.6. The BenchLeader Index combines every independent quality benchmark; GPT-5.4 is ahead overall as of 2026-09-12, but check the category scores for your use.
- Is GPT-5.4 better than o3 for coding?
- o3 scores higher in coding (62 vs 52 on the category index, where 50 is average).
- Is GPT-5.4 better than o3 for agentic tasks?
- o3 scores higher in agentic tasks (70 vs 66 on the category index, where 50 is average).
- Which is cheaper, GPT-5.4 or o3?
- o3 is cheaper: $3.50 against $5.63 per million tokens, blended at three input tokens per output token.
- Which is faster, GPT-5.4 or o3?
- GPT-5.4 streams faster: 132 against 107 output tokens per second.
- Which has the larger context window?
- GPT-5.4 accepts more context: 1.1M against 200k tokens.