token.app › Compare › Claude Sonnet 4 vs Kimi K3
Claude Sonnet 4 vs Kimi K3
Kimi K3 leads on 2 of 2 shared benchmarks. Kimi K3 accepts the larger context window (1.0M).
Head to head
Blended price uses a 3:1 input:output mix
| Claude Sonnet 4 | Kimi K3 | |
|---|---|---|
| Provider | Anthropic | Moonshot AI |
| Input $/1M | $3.00 | $3.00 |
| Output $/1M | $15.00 | $15.00 |
| Blended $/1M | $6.00 | $6.00 |
| Context window | 1M | 1.0M |
| Max output | 64K | — |
| Released | May 2025 | Jul 2026 |
| Licence | Proprietary | Open weights |
| GPQA Diamond | 79.2% | 93.1% |
| OTIS Mock AIME | 71.1% | 97.2% |
Benchmark scores independently run and published by Epoch AI, 'AI Benchmarking Hub', used under CC BY 4.0. Only benchmarks with a score for BOTH models are compared.
Choose Claude Sonnet 4 if…
- No clear advantage on the data we hold.
Choose Kimi K3 if…
- Higher GPQA Diamond (93.1% vs 79.2%)
- Higher OTIS Mock AIME (97.2% vs 71.1%)
- Larger context window (1.0M)
- Open weights — self-hostable
- Newer model (released Jul 2026)
FAQ
Which is better, Claude Sonnet 4 or Kimi K3?
Across the 2 benchmarks both models have independently-run scores for, Claude Sonnet 4 leads on 0 and Kimi K3 leads on 2. Benchmarks are one input — price and context window are on this page too.
Is Claude Sonnet 4 cheaper than Kimi K3?
They cost the same on a blended 3:1 basis: $6.00 per million tokens.
What context windows do Claude Sonnet 4 and Kimi K3 have?
Claude Sonnet 4: 1,000,000 tokens. Kimi K3: 1,048,576 tokens.
Who makes Claude Sonnet 4 and Kimi K3?
Claude Sonnet 4 is made by Anthropic. Kimi K3 is made by Moonshot AI.