Claude Opus 4.8 vs GPT-5.4
Head to head on 28 shared benchmarks, with price, context window, and release dates.
Benchmark scores
53evals · sort by any column, ⤢ to expand fullscreen
| Model | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Claude Opus 4.8 Anthropic | 15.5% | 66.7% | 67.0% | 1281elo | 1835elo | 80.8 | 47.2% | 92.0% | 48.7% | 62.2% | 80.1% | 79.3% | 78.3% | 67.4% | 81.4% | 84.3% | 89.7% | 91.8% | 53.2% | 85.8% | 69.9% | 69.0% | 54.8% | 53.5% | 75.6% | 58.3% | 82.7% | 94.4% | 80.4% | 14.5% | - | - | - | 40.0% | 53.9% | 13.4% | 22.5% | 1890elo | - | 56.9% | - | - | 10.4% | - | - | 83.4% | - | - | 69.2% | 82.7% | - | 60.9% | 70.9% | 63.4% |
| GPT-5.4 OpenAI | 13.1% | 65.3% | 81.0% | 1272elo | 1836elo | 78.3 | 47.6% | 74.8% | 11.3% | 48.4% | 82.0% | 77.5% | 79.3% | 70.2% | 82.6% | 94.1% | 88.1% | 82.8% | 41.3% | 77.5% | 68.3% | 56.0% | 43.3% | 47.1% | 74.0% | 37.9% | 67.4% | 36.0% | - | - | 1.47 | 34.1% | 9.0% | - | - | - | - | - | 87.2% | - | 78.5% | 92063 | - | 86 | 52.2% | - | -0.61 | 40.8 | - | - | 80 | - | - | 60.3% |
2 / 2 models
| Attribute | Claude Opus 4.8 Anthropic | GPT-5.4 OpenAI |
|---|---|---|
| Description | Claude Opus 4.8 (Adaptive Reasoning, Max Effort) is an AI model from Anthropic. | GPT-5.4 is an AI model from OpenAI. |
| Family | Claude | GPT |
| Params | - | - |
| Open weights | - | closed |
| License | - | proprietary |
| Released | 28 May 2026 | 5 Mar 2026 |
| Context | 1,000,000 | 1,050,000 |
| Input $/1M | $5.00 | $2.50 |
| Output $/1M | $25.00 | $15.00 |
| Cache read $/1M | $0.500 | $0.250 |
| Cache write $/1M | $6.250 | - |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | text, image, file | text, image, file |
| Providers | - | - |
| Publisher | Anthropic | OpenAI |
| Reported scores | GPQA Diamond74.8% (AA) SciCode47.1% (AA) τ²-bench (Tau²-bench)36.0% (AA) Terminal-Bench (Hard)37.9% (AA) Vibe Code Bench v1.167.4% |
FAQ
- Is Claude Opus 4.8 or GPT-5.4 better?
- Across the 28 benchmarks both models report on Sophon, Claude Opus 4.8 leads on 20 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude Opus 4.8 and GPT-5.4 compare on GPQA Diamond?
- Claude Opus 4.8 scores 92.0% and GPT-5.4 scores 74.8% on GPQA Diamond.
- Which is cheaper, Claude Opus 4.8 or GPT-5.4?
- GPT-5.4 is cheaper at $15.00 per million output tokens against $25.00 for Claude Opus 4.8 - about 1.7x.
- When were Claude Opus 4.8 and GPT-5.4 released?
- Claude Opus 4.8 was released 28 May 2026 by Anthropic. GPT-5.4 was released 5 Mar 2026 by OpenAI.
Comparing something else? Build your own side-by-side.