Claude Fable 5 vs Claude Opus 4.8
Claude Fable 5 and Claude Opus 4.8 are both current anthropic production-tier models. Claude Opus 4.8 is meaningfully cheaper at $5 / $25 per 1M.
Specs side by side
| Metric | Anthropic Claude Fable 5 | Anthropic Claude Opus 4.8 |
|---|---|---|
| Input price (per 1M) | $10 | $5 |
| Output price (per 1M) | $50 | $25 |
| Context window | 1M tokens | 1M tokens |
| Speed tier | slow | slow |
| 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 Claude Opus 4.8 — pick by provider preference or API ecosystem
Choose Claude Opus 4.8 if…
- Cost is a priority ($5 / $25 per 1M vs $10 / $50 per 1M)
Benchmark delta
Claude Fable 5 leads on
Claude Fable 5 has no meaningful benchmark lead in this pair.
Claude Opus 4.8 leads on
Claude Opus 4.8 has no meaningful benchmark lead in this pair.
FAQ — Claude Fable 5 vs Claude Opus 4.8
Claude Fable 5 vs Claude Opus 4.8 — which is better?
Claude Fable 5 and Claude Opus 4.8 are both current anthropic production-tier models. Claude Opus 4.8 is meaningfully cheaper at $5 / $25 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 Claude Opus 4.8?
Claude Fable 5 costs $10 / $50 per 1M vs Claude Opus 4.8 at $5 / $25 per 1M. Claude Opus 4.8 is cheaper on output tokens by roughly 100%. Both support prompt caching, which reduces effective cost by 80-90% on repeat system prompts.
Does Claude Fable 5 or Claude Opus 4.8 have the bigger context window?
Claude Opus 4.8 has a 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 Claude Opus 4.8?
Claude Fable 5: no — No free API tier; available via Claude.ai paid plans. Claude Opus 4.8: no — Free via Claude.ai web chat; API requires paid credits.
Which is better for coding — Claude Fable 5 or Claude Opus 4.8?
Claude Fable 5 leads on coding benchmarks (Claude Fable 5: 98/100, Claude Opus 4.8: 97/100). For production coding agents also weigh tool-use performance — Claude Fable 5 scores 97, Claude Opus 4.8 scores 96.