Claude Fable 5 vs GPT-5.5
Claude Fable 5 and GPT-5.5 are both current production-tier models. GPT-5.5 is meaningfully cheaper at $5 / $30 per 1M.
Specs side by side
| Metric | Anthropic Claude Fable 5 | OpenAI GPT-5.5 |
|---|---|---|
| Input price (per 1M) | $10 | $5 |
| Output price (per 1M) | $50 | $30 |
| Context window | 1M tokens | 1.1M tokens |
| Speed tier | slow | balanced |
| Open weights | No | No |
| EU region | Yes | Yes |
| Free tier | No | No |
| Prompt caching | Yes | Yes |
| Vision input | Yes | Yes |
| Extended thinking | Yes | Yes |
When to choose each
Choose Claude Fable 5 if…
- Claude Fable 5 is in the same tier as GPT-5.5 — pick by provider preference or API ecosystem
Choose GPT-5.5 if…
- You need realtime speech-to-speech
Benchmark delta
Claude Fable 5 leads on
Claude Fable 5 has no meaningful benchmark lead in this pair.
GPT-5.5 leads on
GPT-5.5 has no meaningful benchmark lead in this pair.
FAQ — Claude Fable 5 vs GPT-5.5
Claude Fable 5 vs GPT-5.5 — which is better?
Claude Fable 5 and GPT-5.5 are both current production-tier models. GPT-5.5 is meaningfully cheaper at $5 / $30 per 1M. The right pick depends on your use case — see "When to choose each" above for a data-driven decision.
How does Claude Fable 5 pricing compare to GPT-5.5?
Claude Fable 5 costs $10 / $50 per 1M vs GPT-5.5 at $5 / $30 per 1M. GPT-5.5 is cheaper on output tokens by roughly 67%. Both support prompt caching, which reduces effective cost by 80-90% on repeat system prompts.
Does Claude Fable 5 or GPT-5.5 have the bigger context window?
GPT-5.5 has a 1.1M-token context window — 1× the 1M context of Claude Fable 5. Enough for entire codebases, books, or multi-document RAG.
Is there a free tier for Claude Fable 5 or GPT-5.5?
Claude Fable 5: no — No free API tier; available via Claude.ai paid plans. GPT-5.5: no — Paid-only — no free API tier; available via ChatGPT Plus/Pro.
Which is better for coding — Claude Fable 5 or GPT-5.5?
Claude Fable 5 leads on coding benchmarks (Claude Fable 5: 98/100, GPT-5.5: 95/100). For production coding agents also weigh tool-use performance — Claude Fable 5 scores 97, GPT-5.5 scores 94.