Compare / head-to-head
Claude Fable 5.1vsQwen3.5-Flash
Claude Fable 5.1 leads 3 of 3 shared benchmarks. Qwen3.5-Flash is 189.9x cheaper per token. Both offer a 1M-token context window.
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
3 – 0
Claude Fable 5.1 leads
Cheaper per token
Qwen3.5-Flash
189.9x cheaper, input + output
Larger context
Tie
both 1M tokens
Provider uptime (30d)
100% · —
Anthropic · Qwen
Claude Fable 5.1
Anthropic · released 2026-09-01
textvision
Qwen3.5-Flash
Qwen · released 2026-02-23
textvision
Quality
Benchmark matrix
3 shared · 5 only Claude Fable 5.1 · 2 only Qwen3.5-Flash| Benchmark | Claude Fable 5.1 | Qwen3.5-Flash | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 3 | ||||
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 90.2% ↗epoch | 9.5% ↗epoch | +80.7 pt | Claude Fable 5.1 |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 100% ↗epoch | 84.4% ↗epoch | +15.6 pt | Claude Fable 5.1 |
| SimpleQA Verified | 70.8% ↗epoch | 20.3% ↗epoch | +50.5 pt | Claude Fable 5.1 |
| Only Claude Fable 5.1 reports · 5 | ||||
| Humanity's Last Exam (no tools) | 60.9% ↗ | not reported | — | — |
| CursorBench 3.2.0 | 73.4% ↗ | not reported | — | — |
| FrontierMath Tier 4 v2 (Epoch AI run) | 87.8% ↗epoch | not reported | — | — |
| GDPval-AA v2 | 1853 ↗ | not reported | — | — |
| Terminal-Bench Science 0.1 | 52.6% ↗ | not reported | — | — |
| Only Qwen3.5-Flash reports · 2 | ||||
| GPQA Diamond | not reported | 82.3% ↗epoch | — | — |
| LMArena Elo | not reported | 1397.7 ↗ | — | — |
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 Qwen3.5-Flash 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 | Qwen3.5-Flash | Edge |
|---|---|---|---|
| Context window | 1M tokens | 1M tokens | Tie |
| Max output | 128K tokens | — | — |
| Input price / 1M | $10 ↗ | $0.029 ↗ | Qwen3.5-Flash |
| Output price / 1M | $50 ↗ | $0.287 ↗ | Qwen3.5-Flash |
| Cached input / 1M | $0.25 ↗ | — | — |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $60 | $0.316 | Qwen3.5-Flash |
| Modalities | text · vision | text · vision | Tie |
| Released | 2026-09-01 | 2026-02-23 | — |
| Cited benchmark scores | 8 | 5 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
Claude Fable 5.1 vs …
Models sharing the most benchmarksMore matchups
Qwen3.5-Flash vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run Claude Fable 5.1 and Qwen3.5-Flash on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.