Moonshot AI Kimi
Kimi K3
$5.40 / 1M tokens
cheapest at SiliconFlow · $2.70 in · $13.50 out
Wins 2 of 4
Head to head · prices updated Oct 31, 2026
Kimi K3 vs Claude Sonnet 5.5
Claude Sonnet 5.5 is 26% cheaper than Kimi K3 at their cheapest providers (blended 3 input : 1 output tokens).
Anthropic Claude
Claude Sonnet 5.5
$4.00 / 1M tokens
cheapest at Anthropic · $2.00 in · $10.00 out
Wins 2 of 4
- Lower priceClaude Sonnet 5.5
- Higher accuracy (GPQA)Claude Sonnet 5.5
- Longer contextKimi K3
- More providersKimi K3
Verdict
Claude Sonnet 5.5 is the better deal on price
Claude Sonnet 5.5 is 26% cheaper than Kimi K3 at their cheapest providers (blended 3 input : 1 output tokens).
Claude Sonnet 5.5 scores higher on GPQA Diamond: 95.6% (max reasoning) vs 93.1% (max reasoning).
Claude Sonnet 5.5 wins on both price and accuracy here.
Kimi K3 accepts longer prompts (1049K vs 1000K tokens).
Your monthly bill
What would each cost you?
Claude Sonnet 5.5 saves you $14.00 a month ($168.00 a year) for this workload.
Side by side
| Kimi K3 | Claude Sonnet 5.5 | |
|---|---|---|
| Cheapest blended price / 1M | $5.40 | $4.00 |
| Input / output per 1M | $2.70 / $13.50 | $2.00 / $10.00 |
| Accuracy (GPQA Diamond) | 93.1% (max reasoning) | 95.6% (max reasoning) |
| Max context | 1M | 1M |
| Providers we track | 9 | 4 |
Standard list prices at each model's cheapest provider we track; blended = 3 input : 1 output tokens. GPQA Diamond from Epoch AI (CC BY 4.0), best measured reasoning setting, named next to each score. Methodology.
Where to buy each one
Kimi K3
- SiliconFlow$5.40
- DeepInfra$5.70
- Alibaba Cloud Model Studio$6.00
- Moonshot AI$6.00
- Baseten$6.00
Questions people ask
Is Kimi K3 cheaper than Claude Sonnet 5.5?
Claude Sonnet 5.5 is 26% cheaper than Kimi K3 at their cheapest providers (blended 3 input : 1 output tokens).
Which is more accurate, Kimi K3 or Claude Sonnet 5.5?
On GPQA Diamond (graduate-level science questions, measured by Epoch AI) Kimi K3 scores 93.1% (max reasoning) and Claude Sonnet 5.5 95.6% (max reasoning). One benchmark is not the whole picture; test both on your own prompts.
How much does Kimi K3 cost per 1M tokens?
From $2.70 input and $13.50 output per 1M tokens at SiliconFlow, the cheapest of 9 providers we track.
How much does Claude Sonnet 5.5 cost per 1M tokens?
From $2.00 input and $10.00 output per 1M tokens at Anthropic, the cheapest of 4 providers we track.
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