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Claude Fable 5 vs Claude Sonnet 5
Claude Fable 5 scores higher than Claude Sonnet 5 on both public leaderboards that rate them. On the ArtificialWatch Index, which takes the median of each model's percentile across the boards that score it, Claude Fable 5 is at 60.4 and Claude Sonnet 5 at 21.8 (out of 100). On each maker's API, Claude Fable 5 costs $10 / $50 per 1M tokens (input / output) and Claude Sonnet 5 $2 / $10.
Scores as published by each board; table composed November 8, 2026.
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Leaderboard by leaderboard
| Board | Claude Fable 5 | Claude Sonnet 5 | Higher |
|---|---|---|---|
| LMArena Elo (community votes) | 1,625 | 1,539.1 | Claude Fable 5 |
| SimpleBench AVG@5 % (private set) | 81.9 | 60.6 | Claude Fable 5 |
Raw scores are each board's own scale, so compare within a row, not across rows. Full table: the bench index.
For coding
On the ArtificialWatch coding index, Claude Fable 5 is at 88.1 (#5 of 45) and Claude Sonnet 5 at 42 (#24). Claude Fable 5 scores higher on both coding boards that rate them.
| Coding board | Claude Fable 5 | Claude Sonnet 5 |
|---|---|---|
| LMArena · Coding | 1,518.7 | 1,483.5 |
| Vals Vibe Code Bench | 90.4 | 81.3 |
Claude Fable 5 at a glance
- Developer
- Anthropic
- Status
- Live since July 1, 2026
- API price
- $10 input / $50 output per 1M tokens · Anthropic, claude-fable-5
- Context window
- 1M tokens
Returned Jul 1.
Claude Sonnet 5 at a glance
- Developer
- Anthropic
- Status
- Live since June 30, 2026
- API price
- $2 input / $10 output per 1M tokens · Anthropic, claude-sonnet-5
- Context window
- 1M tokens
Shipped Jun 30.
Claude Fable 5 vs Claude Sonnet 5: quick answers
Which is better, Claude Fable 5 or Claude Sonnet 5?
It depends on what you measure. Claude Fable 5 scores higher than Claude Sonnet 5 on both public leaderboards that rate them. Claude Fable 5's widest lead is on SimpleBench. On the ArtificialWatch Index, which takes the median of each model's percentile across the boards that score it, Claude Fable 5 is at 60.4 and Claude Sonnet 5 at 21.8 (out of 100).
Which is newer, Claude Fable 5 or Claude Sonnet 5?
Claude Fable 5. It went live on July 1, 2026, 1 day after Claude Sonnet 5 (June 30, 2026).
Which is cheaper, Claude Fable 5 or Claude Sonnet 5?
Claude Sonnet 5 is cheaper on both input and output. On each vendor's own API, Claude Fable 5 is $10 input / $50 output per million tokens and Claude Sonnet 5 is $2 input / $10 output per million tokens. Prices as published in the models.dev catalog, as of 2026-11-08.
Which has the bigger context window, Claude Fable 5 or Claude Sonnet 5?
Neither. Both take 1M tokens.
How do Claude Fable 5 and Claude Sonnet 5 compare for coding?
On the ArtificialWatch coding index, Claude Fable 5 is at 88.1 (#5 of 45) and Claude Sonnet 5 at 42 (#24). Claude Fable 5 scores higher on both coding boards that rate them.
Who makes Claude Fable 5 and Claude Sonnet 5?
Both are from Anthropic.
Where do these numbers come from?
Each score is the leaderboard's own published figure, read by ArtificialWatch (table composed November 8, 2026). Boards measure different things, so raw scores are only comparable within a row.
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Also: the bench index · API pricing · what a workload costs on each · the wire