Claude Sonnet 4.5 vs Kimi K3
Side-by-side comparison of pricing, capabilities, benchmarks, and use case fit.
A
Claude Sonnet 4.5
Anthropic
MA
Kimi K3
Moonshot AI
Capability radar
Normalized coding, reasoning, writing, vision, context, and value
Claude Sonnet 4.5Kimi K3
| Metric | Claude Sonnet 4.5 | Kimi K3 |
|---|---|---|
| Input Price / 1M | $3.00 | $3.00 |
| Output Price / 1M | $15.00 | $15.00 |
| Combined Price / 1M | $18.00 | $18.00 |
| Context Window | 200,000 | 1,000,000 |
| Coding Score | 95 | 93 |
| Reasoning Score | 93 | 94 |
| Vision Score | 88 | 88 |
| Audio | No | No |
| Streaming | Yes | Yes |
| Function Calling | Yes | Yes |
| Latency Tier | fast | standard |
| Release Date | 6/15/2026 | 7/16/2026 |
Claude Sonnet 4.5 — Strengths & Weaknesses
Strengths
- Coding excellence
- Speed/quality balance
- Strong agents
Weaknesses
- Below Opus on hardest analysis
Kimi K3 — Strengths & Weaknesses
Strengths
- 1M context
- Frontier coding/reasoning
- Native multimodal
Weaknesses
- Premium output pricing
- Newer ecosystem tooling
Use Case Verdicts
Enterprise Use
Kimi K3 combines strong reasoning, tooling, and context for enterprise workloads.
Agent Workflows
Claude Sonnet 4.5 is better suited for agentic workflows with tool use and coding capability.