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, front-end and visual...
At a glance
- Context window
- 1Mtokens
- Max output
- 128Ktokens
- Knowledge to
- —
- Released
- 2026
Capabilities
Benchmarks
- Intelligence index
- 53
- Coding index
- 82
- Agentic index
- 58
Design Arena
| Category | Elo | Win rate |
|---|---|---|
| models · 3d | 1,425 | 68.7 |
| models · gamedev | 1,416 | 67.1 |
| models · dataviz | 1,364 | 63.1 |
| models · svg | 1,352 | 64.4 |
| models · codecategories | 1,346 | 59.1 |
| models · uicomponent | 1,335 | 58.1 |
| models · asciiart | 1,329 | 65.5 |
| models · website | 1,322 | 56.3 |
Standard evaluations
| Benchmark | Score | Tasks |
|---|---|---|
| gpqa_diamond | 0.9 | 396 |
| tau_bench_verified_airline | 0.78 | 50 |
Source: Artificial Analysis, Design Arena · as of Sep 16, 2026
Performance
Uptime on IranRouter
0%
Reference uptime
100%
Median latency
5,545 ms
Throughput
44.1 tok/s
IranRouter uptime comes from our own automated probes; the reference figures are daily measurements of this model's upstream routes. Each card shows a 30-day average, and a day without data stays empty.
Popularity
- Current rank
- #37
- Rank change, 7 days
- +5
Daily tokens · 90 days
58.5B
Ranked by daily token volume across the global model market; the figure above the chart is the daily average.
Supported parameters
Parameters this model accepts; anything else is ignored.
Quick start
from openai import OpenAI
client = OpenAI(
api_key="ir-...",
base_url="https://iranrouter.com/v1",
)
resp = client.chat.completions.create(
model="anthropic/claude-fable-5.1",
messages=[{"role": "user", "content": "سلام!"}],
)
print(resp.choices[0].message.content)Only base_url and the key change; the rest of your code stays as it is.