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Claude Fable 5.1 vs Kimi K2.5

At a glance

Anthropic's upgraded Mythos-class flagship, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work.

1M ctx$10.00/$50.00 per M

MoonshotAI's native multimodal model with state-of-the-art visual coding.

80262K ctx$0.57/$2.85 per M#25/92
Demos
All demos

No shared demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Capability
Capability—
Reasoning & Knowledge
Expert-Level—
Coding
Real-World Coding—
Agentic
Terminal Tasks—Novel Reasoning—
Reasoning
ReasoningInsufficient data
MathInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Cheaper94%
Capability
CapabilityECI80.3
Reasoning & Knowledge
Expert-Level24.4%
Coding
Real-World Coding73.8%
Agentic
Terminal Tasks43.2%Novel Reasoning11.8%
Specs
1M
Context
128K
Max output
Sep 2026
Released
262K
Context
128K
Max output
Jan 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input$10.00/M tokens
Output$50.00/M tokens
Cache read$0.25/M tokens
Cache write$12.50/M tokens
Web search$0.01/search
Live pricing, shown before you run
Input94%$0.57/M tokens
Output94%$2.85/M tokens
Cache read62%$0.10/M tokens
Chat with Claude Fable 5.1Go to model
Chat with Kimi K2.5Go to model
Frequently Asked Questions: Claude Fable 5.1 vs Kimi K2.5▼

Which is better, Claude Fable 5.1 or Kimi K2.5?

▼

Both Claude Fable 5.1 and Kimi K2.5 are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which is cheaper, Claude Fable 5.1 or Kimi K2.5?

▼

Kimi K2.5 has a lower blended cost. Claude Fable 5.1: $10.00 input / $50.00 output. Kimi K2.5: $0.57 input / $2.85 output.

Which has a larger context window, Claude Fable 5.1 or Kimi K2.5?

▼

Claude Fable 5.1 has a larger context window: Claude Fable 5.1 supports 1M tokens vs Kimi K2.5 at 262K tokens.

Do both Claude Fable 5.1 and Kimi K2.5 support vision?

▼

Yes, both Claude Fable 5.1 and Kimi K2.5 support vision/image input.

What are the key differences between Claude Fable 5.1 and Kimi K2.5?

▼

Key differences: Kimi K2.5 is significantly cheaper. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both Claude Fable 5.1 and Kimi K2.5 for free on idapt.app to see which performs better for your specific needs.

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