Compare / head-to-head
Claude Fable 5.1vsSonar Pro
Claude Fable 5.1 and Sonar Pro do not yet share a public benchmark, so quality cannot be compared apples-to-apples. Sonar Pro is 3.3x cheaper per token. Claude Fable 5.1 has the larger context window (1M tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
0
no overlap yet
Cheaper per token
Sonar Pro
3.3x cheaper, input + output
Larger context
Claude Fable 5.1
1M tokens
Provider uptime (30d)
100% · 100%
Anthropic · Perplexity
Claude Fable 5.1
Anthropic · released 2026-09-01
textvision
Quality
Benchmark matrix
0 shared · 8 only Claude Fable 5.1 · 1 only Sonar Pro| Benchmark | Claude Fable 5.1 | Sonar Pro | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 0 | ||||
| No public benchmark is reported for both models yet. | ||||
| Only Claude Fable 5.1 reports · 8 | ||||
| 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 | — | — |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 90.2% ↗epoch | not reported | — | — |
| GDPval-AA v2 | 1853 ↗ | not reported | — | — |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 100% ↗epoch | not reported | — | — |
| SimpleQA Verified | 70.8% ↗epoch | not reported | — | — |
| Terminal-Bench Science 0.1 | 52.6% ↗ | not reported | — | — |
| Only Sonar Pro reports · 1 | ||||
| SimpleQA F-score | not reported | 85.8% ↗ | — | — |
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 Sonar Pro 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 | Sonar Pro | Edge |
|---|---|---|---|
| Context window | 1M tokens | 200K tokens | Claude Fable 5.1 |
| Max output | 128K tokens | — | — |
| Input price / 1M | $10 ↗ | $3 ↗ | Sonar Pro |
| Output price / 1M | $50 ↗ | $15 ↗ | Sonar Pro |
| Cached input / 1M | $0.25 ↗ | — | — |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $60 | $18 | Sonar Pro |
| Modalities | text · vision | text | Claude Fable 5.1 |
| Released | 2026-09-01 | 2025-01-21 | — |
| Cited benchmark scores | 8 | 1 | — |
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
Sonar Pro 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 Sonar Pro on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.