Claude Fable 5 vs GPT-5.4 Mini
Head to head on 25 shared benchmarks, with price, context window, and release dates.
Benchmark scores
45evals · sort by any column, ⤢ to expand fullscreen
| Model | ||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Claude Fable 5 Anthropic | 17.4% | 71.8% | 1943elo | 83 | 56.3% | 92.6% | 55.5% | 63.5% | 81.4% | 78.6% | 80.0% | 59.9% | 88.5% | 93.9% | 87.3% | 68.9% | 95.0% | 51.9% | 60.2% | 76.9% | 62.9% | 61.4% | 74.2% | 90.4% | 98.5% | 83.9% | 38.6% | 87.0% | - | - | 1340elo | 78.0% | 29.3% | - | 29.8% | 1932elo | 66.0% | - | 13.3% | 56.1% | 88.5% | 85.0% | 80.3% | 88.0% | - | 69.2% |
| GPT-5.4 Mini OpenAI | 37.0% | 60.9% | 1665elo | 73 | 45.4% | 87.5% | 28.1% | 73.3% | 70.9% | 71.6% | 70.9% | 60.3% | 71.5% | 78.6% | 72.5% | 63.5% | 21.0% | 50.8% | 52.1% | 71.2% | 52.3% | 33.2% | 54.2% | 48.0% | 83.3% | - | - | - | 21.2% | 3.9% | - | - | - | 28.3% | - | - | - | 80.3% | - | - | - | - | - | - | 61.7 | 55.2% |
2 / 2 models
| Attribute | Claude Fable 5 Anthropic | GPT-5.4 Mini OpenAI |
|---|---|---|
| Description | Claude Fable 5 is Anthropic's most capable widely released model, built for the most demanding reasoning and long-horizon agentic work. Shares its base model with the invitation-only Claude Mythos 5. | GPT-5.4 mini is an AI model from OpenAI. |
| Family | Claude | GPT |
| Params | - | - |
| Open weights | closed | closed |
| License | - | proprietary |
| Released | 9 Jun 2026 | 17 Mar 2026 |
| Context | 1,000,000 | 400,000 |
| Input $/1M | $10.00 | $0.75 |
| Output $/1M | $50.00 | $4.50 |
| Cache read $/1M | $1.000 | $0.075 |
| Cache write $/1M | $12.500 | - |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | text, image, file | file, image, text |
| Providers | - | - |
| Publisher | Anthropic | OpenAI |
| Reported scores | Finance Agent (v2)56.3% IFBench63.5% (AA) Swebenchpro80.3% LiveBench - Math93.9% (LiveBench) LiveBench - Coding78.6% (LiveBench) |
FAQ
- Is Claude Fable 5 or GPT-5.4 Mini better?
- Across the 25 benchmarks both models report on Sophon, Claude Fable 5 leads on 22 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude Fable 5 and GPT-5.4 Mini compare on GPQA Diamond?
- Claude Fable 5 scores 92.6% and GPT-5.4 Mini scores 87.5% on GPQA Diamond.
- Which is cheaper, Claude Fable 5 or GPT-5.4 Mini?
- GPT-5.4 Mini is cheaper at $4.50 per million output tokens against $50.00 for Claude Fable 5 - about 11.1x.
- When were Claude Fable 5 and GPT-5.4 Mini released?
- Claude Fable 5 was released 9 Jun 2026 by Anthropic. GPT-5.4 Mini was released 17 Mar 2026 by OpenAI.
Other head-to-heads
56Claude Fable 5 vs Claude Opus 4.840 shared evalsClaude Fable 5 vs GPT-5.539 shared evalsClaude Fable 5 vs Gemini 3.1 Pro Preview36 shared evalsGemini 3.1 Pro Preview vs GPT-5.4 Mini30 shared evalsClaude Fable 5 vs Claude Sonnet 4.628 shared evalsClaude Fable 5 vs Claude Opus 4.728 shared evalsClaude Sonnet 4.6 vs GPT-5.4 Mini28 shared evalsGPT-5.4 Mini vs GPT-5.427 shared evalsGPT-5.4 Mini vs GPT-5.526 shared evalsClaude Opus 4.8 vs GPT-5.4 Mini26 shared evalsClaude Fable 5 vs Claude Opus 4.626 shared evalsClaude Fable 5 vs GPT-5.426 shared evalsClaude Fable 5 vs Kimi K2.526 shared evalsClaude Opus 4.7 vs GPT-5.4 Mini26 shared evalsGPT-5.4 Mini vs GPT-5.225 shared evalsClaude Opus 4.5 vs GPT-5.4 Mini25 shared evalsClaude Fable 5 vs GLM 5.125 shared evalsClaude Opus 4.6 vs GPT-5.4 Mini25 shared evalsGPT-5.4 Mini vs Kimi K2.525 shared evalsClaude Fable 5 vs Claude Sonnet 4.524 shared evalsGPT-5.4 Mini vs GPT-5 Mini24 shared evalsClaude Fable 5 vs GPT-5.224 shared evalsClaude Fable 5 vs Qwen3.6 Plus24 shared evalsGLM 5.1 vs GPT-5.4 Mini24 shared evalsGPT-5.4 Mini vs Qwen3.6 Plus24 shared evalsClaude Sonnet 4.5 vs GPT-5.4 Mini23 shared evalsClaude Fable 5 vs GPT-5 Mini23 shared evalsClaude Fable 5 vs Claude Opus 4.523 shared evalsClaude Fable 5 vs Grok 4.1 Fast23 shared evalsClaude 4 Sonnet vs Claude Fable 522 shared evalsDeepSeek V3.2 vs GPT-5.4 Mini22 shared evalsGPT-5.4 Mini vs Grok 4.1 Fast22 shared evalsClaude Fable 5 vs GPT-5 Nano21 shared evalsGPT-5.4 Mini vs GPT-5 Nano20 shared evalsClaude Fable 5 vs DeepSeek V3.220 shared evalsClaude Fable 5 vs GLM 4.720 shared evalsClaude Fable 5 vs Gemini 2.5 Pro19 shared evalsClaude 4 Sonnet vs GPT-5.4 Mini19 shared evalsGLM 4.7 vs GPT-5.4 Mini19 shared evalsClaude Fable 5 vs GPT-6 Astra18 shared evalsClaude Fable 5 vs gpt-oss-120b18 shared evalsGemini 2.5 Pro vs GPT-5.4 Mini18 shared evalsGPT-5.4 Mini vs gpt-oss-120b17 shared evalsClaude Fable 5 vs GPT-516 shared evalsGPT-5 vs GPT-5.4 Mini16 shared evalsGPT-4o vs GPT-5.4 Mini14 shared evalsClaude Fable 5 vs GPT-4o13 shared evalsClaude Fable 5 vs GPT-4o-mini12 shared evalsGPT-4o-mini vs GPT-5.4 Mini12 shared evalsGPT-5.4 Mini vs GPT-6 Astra12 shared evalsGPT-4.1 Nano vs GPT-5.4 Mini12 shared evalsGPT-4.1 Mini vs GPT-5.4 Mini11 shared evalsClaude Fable 5 vs GPT-4.1 Nano11 shared evalsGPT-4.1 vs GPT-5.4 Mini11 shared evalsClaude Fable 5 vs GPT-4.1 Mini10 shared evalsClaude Fable 5 vs GPT-4.110 shared evals
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