Claude Fable 5.1
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Claude Fable 5.1

claude-fable-5-1llms.txt
Anthropic
Claude-fable-5-1 is Anthropic's most capable newly released model, suitable for the most demanding reasoning and long-running agent work. Claude Fable 5.1, while keeping input and output prices the same as Claude Fable 5, reduces cache read prices to one quarter of the original and is more capable for long-running agent programming, multi-step research, and document, spreadsheet, and slide processing. (The model is extremely expensive and not recommended for casual use.)

Pricing

PricingCache ReadWeb SearchCache WriteCache Write 5 MinutesCache Write 1 Hour
$11.000$55.000
$2.75/M tokens$0.01/request$13.75/M tokens$13.75/M tokens$22/M tokens

Input Modalities

  • Text
  • Vision

Output Modalities

  • Text

Capabilities

  • Thinking
  • Tools
  • Tool calling
  • Structured outputs

Providers

AWS claude-fable-5-1
Pricing$11.000$55.000
Cache Read$2.75/M tokens
Web Search$0.01/request
Cache Write$13.75/M tokens
Cache Write 5 Minutes$13.75/M tokens
Cache Write 1 Hour$22/M tokens
Context1M
Max output128K
Latency17.6S
Throughput47.0TPS
Uptime
0.00% uptime 2 days ago
0.00% uptime yesterday
100.00% uptime today
Anthropic claude-fable-5-1
Pricing$11.000$55.000
Cache Read$2.75/M tokens
Web Search$0.01/request
Cache Write$13.75/M tokens
Cache Write 5 Minutes$13.75/M tokens
Cache Write 1 Hour$22/M tokens
Context1M
Max output128K
Latency2.4S
Throughput62.6TPS
Uptime
0.00% uptime 2 days ago
0.00% uptime yesterday
100.00% uptime today

Performance for claude-fable-5-1

Uptime is the percentage of requests that succeeded over the past 72 hours. AIHubMix continuously monitors every provider and automatically retries with the next-best provider when one returns an error or responds too slowly; Latency is total round-trip time (lower is better); Throughput is how fast the model writes (tokens per second, higher is better).

Uptime
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Latency
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Throughput
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Try this model

Python
import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ["AIHUBMIX_API_KEY"],
    base_url="https://aihubmix.com/v1",
)

response = client.chat.completions.create(
    model="claude-fable-5-1",
    messages=[
      {
        "role": "user",
        "content": "Hello, how are you?"
      }
    ],
    max_tokens=1024,
    stream=False,
)

print(response.choices[0].message.content)

Frequently asked questions

What is Claude Fable 5.1?

Claude-fable-5-1 is Anthropic's most capable newly released model, suitable for the most demanding reasoning and long-running agent work. Claude Fable 5.1, while keeping input and output prices the same as Claude Fable 5, reduces cache read prices to one quarter of the original and is more capable for long-running agent programming, multi-step research, and document, spreadsheet, and slide processing. (The model is extremely expensive and not recommended for casual use.)