Compare / head-to-head
Claude Fable 5.1vsGPT-5.4
Claude Fable 5.1 leads 5 of 5 shared benchmarks. GPT-5.4 is 3.4x cheaper per token. GPT-5.4 has the larger context window (1.1M tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
5 – 0
Claude Fable 5.1 leads
Cheaper per token
GPT-5.4
3.4x cheaper, input + output
Larger context
GPT-5.4
1.1M tokens
Provider uptime (30d)
100% · 95.4802%
Anthropic · OpenAI
Claude Fable 5.1
Anthropic · released 2026-09-01
textvision
Quality
Benchmark matrix
5 shared · 3 only Claude Fable 5.1 · 15 only GPT-5.4| Benchmark | Claude Fable 5.1 | GPT-5.4 | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 5 | ||||
| Humanity's Last Exam (no tools) | 60.9% ↗ | 39.8% ↗ | +21.1 pt | Claude Fable 5.1 |
| FrontierMath Tier 4 v2 (Epoch AI run) | 87.8% ↗epoch | 49% ↗epoch | +38.8 pt | Claude Fable 5.1 |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 90.2% ↗epoch | 78.6% ↗epoch | +11.6 pt | Claude Fable 5.1 |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 100% ↗epoch | 97.8% ↗epoch | +2.2 pt | Claude Fable 5.1 |
| SimpleQA Verified | 70.8% ↗epoch | 45.1% ↗epoch | +25.7 pt | Claude Fable 5.1 |
| Only Claude Fable 5.1 reports · 3 | ||||
| CursorBench 3.2.0 | 73.4% ↗ | not reported | — | — |
| GDPval-AA v2 | 1853 ↗ | not reported | — | — |
| Terminal-Bench Science 0.1 | 52.6% ↗ | not reported | — | — |
| Only GPT-5.4 reports · 15 | ||||
| GPQA Diamond | not reported | 92.8% ↗ | — | — |
| AIME 2026 | not reported | 99.2% ↗matharena ⚠ | — | — |
| LMArena Elo | not reported | 1452.6 ↗ | — | — |
| BrowseComp | not reported | 82.7% ↗ | — | — |
| GDPval (wins or ties) | not reported | 83% ↗ | — | — |
| Humanity's Last Exam (with tools) | not reported | 52.1% ↗ | — | — |
| MCP Atlas | not reported | 67.2% ↗ | — | — |
| MMMU-Pro (no tools) | not reported | 81.2% ↗ | — | — |
| MMMU-Pro (with tools) | not reported | 82.1% ↗ | — | — |
| OSWorld-Verified | not reported | 75% ↗ | — | — |
| SWE-Bench Pro | not reported | 57.7% ↗ | — | — |
| SWE-bench Verified (Epoch AI run) | not reported | 76.9% ↗epoch | — | — |
| Tau2-bench Telecom | not reported | 98.9% ↗ | — | — |
| Terminal-Bench 2.0 | not reported | 75.1% ↗ | — | — |
| Toolathlon | not reported | 54.6% ↗ | — | — |
Scores tagged "epoch" or "matharena" are independent runs, used only where the lab has not published its own; ⚠ marks rows MathArena flags as released after the competition. Higher is better on every row. Δ is Claude Fable 5.1 minus GPT-5.4 in the benchmark's own unit. "Not reported" means the lab has not published that figure; it is not a zero. ↗ opens the source.
Specs & pricing
Side by side
Official pricing pages and model cards| Spec | Claude Fable 5.1 | GPT-5.4 | Edge |
|---|---|---|---|
| Context window | 1M tokens | 1.1M tokens | GPT-5.4 |
| Max output | 128K tokens | 128K tokens | Tie |
| Input price / 1M | $10 ↗ | $2.5 ↗ | GPT-5.4 |
| Output price / 1M | $50 ↗ | $15 ↗ | GPT-5.4 |
| Cached input / 1M | $0.25 ↗ | $0.25 ↗ | Tie |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $60 | $17.5 | GPT-5.4 |
| Modalities | text · vision | text · vision | Tie |
| Released | 2026-09-01 | 2026-03-05 | — |
| Cited benchmark scores | 8 | 21 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
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GPT-5.4 vs …
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Which one wins on your data?
Public benchmarks are a starting point. Run Claude Fable 5.1 and GPT-5.4 on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.