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Claude Fable 5 vs Claude Opus 4.8

Both models are evenly matched

Arena ELO

Claude Opus 4.8

Cheaper

Tie

Faster

Tie

Detailed Comparison

CategoryClaude Fable 5Claude Opus 4.8
ProviderAnthropic Anthropic
Context Window1M WIN200K
Input Price ($/1M)$5 $5
Output Price ($/1M)$25 $25
Arena ELON/A 1580 WIN
CodingN/A N/A
ReasoningN/A N/A
Speed (tokens/sec)N/A N/A
Open SourceNo No

Frequently Asked Questions

Which is cheaper, Claude Fable 5 or Claude Opus 4.8?

Claude Opus 4.8 is approximately 0% cheaper than Claude Fable 5 per million tokens.

Which has a larger context window?

Claude Fable 5 supports 1M context, while Claude Opus 4.8 supports 200K.

Is Claude Fable 5 or Claude Opus 4.8 open source?

Claude Fable 5 is proprietary. Claude Opus 4.8 is proprietary.

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Claude Opus 5 undercuts Fable 5 on price

Claude Code turns chat into terminal work

Anthropic extends Claude Fable access after GPT-5.6

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