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Claude Sonnet 5 vs Kimi K3

At a glance
AnthropicClaude Sonnet 5

Anthropic's fifth-generation Sonnet — near-Opus intelligence at Sonnet speed and price.

801M ctx$3.00/$15.00 per M#26/92
MoonshotAIKimi K3

MoonshotAI's 2.8T-parameter flagship for complex coding, knowledge work, and long-horizon agent runs.

1.0M ctx$3.00/$15.00 per M
AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
AnthropicClaude Sonnet 5
Reasoning
CI 72.7-84.7
CodingInsufficient data
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Capability
CapabilityECI80.1
Reasoning & Knowledge
Graduate Science90.5%Expert-Level—Factual Recall25.0%
Math
Competition Math94.7%
Agentic
Terminal Tasks—
MoonshotAIKimi K3
Reasoning
CodingInsufficient data
MathInsufficient data
Sources:Provider·OpenRouter· as of 2026-07-16
Capability
Capability—
Reasoning & Knowledge
Graduate Science93.5%Expert-Level43.5%Factual Recall—
Math
Competition Math—
Agentic
Terminal Tasks88.3%
Specs
AnthropicClaude Sonnet 5
1M
Context
64K
Max output
Jun 2026
Released
MoonshotAIKimi K3
1.0M
Context
16K
Max output
Jul 2026
Released
Capabilities
AnthropicClaude Sonnet 5
Vision
Audio
Reasoning
MoonshotAIKimi K3
Vision
Audio
Reasoning
Pricing
AnthropicClaude Sonnet 5
Live pricing, shown before you run
Input$3.00/M tokens
Output$15.00/M tokens
Cache read$0.30/M tokens
Cache write$3.75/M tokens
Web search$0.01/search
MoonshotAIKimi K3
Live pricing, shown before you run
Input$3.00/M tokens
Output$15.00/M tokens
Cache read$0.30/M tokens
Chat with Claude Sonnet 5Go to model
Chat with Kimi K3Go to model
Frequently Asked Questions: Claude Sonnet 5 vs Kimi K3▼

Which is better, Claude Sonnet 5 or Kimi K3?

▼

Both Claude Sonnet 5 and Kimi K3 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 Sonnet 5 or Kimi K3?

▼

Claude Sonnet 5 has a lower blended cost. Claude Sonnet 5: $3.00 input / $15.00 output. Kimi K3: $3.00 input / $15.00 output.

Which has a larger context window, Claude Sonnet 5 or Kimi K3?

▼

Kimi K3 has a larger context window: Claude Sonnet 5 supports 1M tokens vs Kimi K3 at 1M tokens.

Do both Claude Sonnet 5 and Kimi K3 support vision?

▼

Yes, both Claude Sonnet 5 and Kimi K3 support vision/image input.

What are the key differences between Claude Sonnet 5 and Kimi K3?

▼

Claude Sonnet 5 and Kimi K3 have similar overall capabilities. The main differences lie in pricing, context window size, and provider-specific strengths. Use this comparison page to review all metrics side by side.

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 Sonnet 5 and Kimi K3 for free on idapt.app to see which performs better for your specific needs.

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