Claude Fable 5vsGPT-5.5
Across 3 shared benchmarks, Claude Fable 5 leads overall: Claude Fable 5 wins 3, GPT-5.5 wins 0, with 0 ties and an average score difference of +11.60.
Claude Fable 5
Anthropic · 2026-06-09 · Reasoning model
GPT-5.5
OpenAI · 2026-04-23 · Reasoning model
Claude Fable 53 wins(100%)(0%)0 winsGPT-5.5
Benchmark scores
Grouped by capability, sorted by largest gap within each. 3 shared benchmarks.
AI Agent - Tool Usage
Claude Fable 5 1/1| Benchmark | Claude Fable 5 | GPT-5.5 | Diff |
|---|---|---|---|
| OSWorld-Verified | 851 / 19Deep Thinking (With Tools) | 78.705 / 19Thinking High (With Tools) | +6.30 |
Coding and Software Engineer
Claude Fable 5 1/1| Benchmark | Claude Fable 5 | GPT-5.5 | Diff |
|---|---|---|---|
| SWE-Bench Pro - Public | 80.301 / 43Deep Thinking (With Tools) |
Specs
| Field | Claude Fable 5 | GPT-5.5 |
|---|---|---|
| Publisher | Anthropic | OpenAI |
| Release date | 2026-06-09 | 2026-04-23 |
| Model type | Reasoning model | Reasoning model |
| Architecture | Dense | Dense |
| Parameters | Not available | Not available |
| Context length | 1M | 1000K |
| Max output | 128K | 128K |
API pricing
Prices use DataLearner records when available; missing fields are not inferred.
| Item | Claude Fable 5 | GPT-5.5 |
|---|---|---|
| Text input | $10 / 1M tokens | $0.5 / 1M tokens |
| Text output | $50 / 1M tokens | $30 / 1M tokens |
| Cache read | $1 / 1M tokens | $0.5 / 1M tokens |
| Cache write | $12.5 / 1M tokens | $6.25 / 1M tokens |
Summary
- Claude Fable 5leads in:AI Agent - Tool Usage (1/1), Coding and Software Engineer (1/1), General Knowledge (1/1)
On average across the 3 shared benchmarks, Claude Fable 5 scores 11.60 higher.
Largest single-benchmark gap: SWE-Bench Pro - Public — Claude Fable 5 80.30 vs GPT-5.5 58.60 (+21.70).
Page generated from structured model, pricing and benchmark records. No real-time LLM is used to write the prose.