Claude Fable 5 vs GPT-5.5
Side-by-side comparison. Updated 2026-08-09.
Summary
Compare Claude Fable 5 and GPT-5.5 across pricing, context window, modalities, strengths, weaknesses, and best-fit workloads.
Use the details below to weigh cost, context, modalities, and workload fit.
At a Glance
| Attribute | Claude Fable 5 | GPT-5.5 |
|---|---|---|
| Lab | Anthropic | OpenAI |
| Tags | Agentic Coding Intelligent Reasoning Long Context | Intelligent Reasoning Multimodal |
| Context | 1,000,000 tokens | 128,000 tokens |
| Input price | $10.00/1M | $12.50/1M |
| Output price | $50.00/1M | $50.00/1M |
| Input modalities | Image, Text | Text |
| Output modalities | Text | Text |
Claude Fable 5 Strengths
- #1 Intelligence Index at 64.9
- 1M-token context window
- 95% on SWE-bench Verified
- Strong agentic and coding performance
- Vision and scientific research capable
GPT-5.5 Strengths
- Strong general knowledge
- Deep reasoning chain-of-thought
- Reliable structured output
- Broad tool-use capability
- Excellent multilingual support