Model comparison
Claude 3 Haiku vs Claude Fable 5.1
Price history, scores and specs for both models, line by line. Every value shows where it came from and when we last confirmed it.
Anthropic
Claude 3 Haiku
Claude 3 Haiku is Anthropic's fastest and most compact model for near-instant responsiveness. Quick and accurate targeted performance.
Anthropic
Claude Fable 5.1
Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors.
Quick take
Where each one leads
- Claude Fable 5.1 scores higher on the Artificial Analysis Intelligence Index: 50 to 5.6.
Each line comes from a checked value in the tables below. Pick on your workload: price and usage matter for high volume, context and scores for long documents and agent loops.
Price history
Prices side by side, day by day
- Claude 3 Haiku No price history checked yet
- Claude Fable 5.1
- Claude 3 Haiku No price history checked yet
- Claude Fable 5.1
Prices are the listed OpenRouter base rates in US dollars. A day we could not confirm is left out of the line, never filled in.
Price
What each one costs now
| Measure | Claude 3 Haiku | Claude Fable 5.1 |
|---|---|---|
| Input price | Not checked yet | $10.00 per million tokens |
| Output price | Not checked yet | $50.00 per million tokens |
Scores
Benchmarks, with source and date
| Measure | Claude 3 Haiku | Claude Fable 5.1 |
|---|---|---|
| Artificial Analysis Intelligence Index | 5.6 | 50 Leads |
| Artificial Analysis Coding Index | Not checked yet | 81.6 |
| Artificial Analysis Agentic Index | Not checked yet | 57.9 |
| LMArena text rating (Elo) | 1,195 | 1,513 Leads |
| LMArena web development rating (Elo) | Not checked yet | 1,746 |
| LMArena vision rating (Elo) | 950 | 1,321 Leads |
| Design Arena rating (Elo) | Not checked yet | 1,424 |
Specs
Context, modalities and tool use
| Measure | Claude 3 Haiku | Claude Fable 5.1 |
|---|---|---|
| Context window | Not checked yet | 1,000,000 tokens |
| Reads | Not checked yet | Text, Images, Files |
| Writes | Not checked yet | Text |
| Tool calling | Not checked yet | Yes |
| Reasoning mode | Not checked yet | Yes |
| Open weights | Not checked yet | No |
| Listed since | Not checked yet | 1 Sept 2026 |
Usage
How much each one is used
| Measure | Claude 3 Haiku | Claude Fable 5.1 |
|---|---|---|
| Tokens served on OpenRouter in a day | 3.9M (for 26 Sept 2026) | 25.9B (for 7 Nov 2026) |
| Requests on OpenRouter in a day | 1.1K (for 26 Sept 2026) | 246.7K (for 7 Nov 2026) |
| Tool calls on OpenRouter in a day | 81 (for 26 Sept 2026) | 134.9K (for 7 Nov 2026) |
| Token usage, last 7 days | Not checked yet | Down 23% on the week before (for 7 Nov 2026) |
- Claude 3 Haiku
- Claude Fable 5.1
How this works
One link, either order
This link stays the same whichever order you name the two models in, so you can share it as it is. A line appears only when at least one model has a value we confirmed from a source; values we have not confirmed are left out, never guessed. To add a third record of any type, use the open comparison. Read how we check facts.