Kimi K3 vs GPT-5.6 Sol
Side-by-side comparison of API pricing, specs, benchmarks, and capabilities
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Mby Moonshot
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Oby OpenAI
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|---|---|---|
| Overview | ||
| Status | Current flagship Open weights | Current flagship |
| Released | Jul 16, 2026 | Jul 9, 2026 |
| Pricing per million tokens | ||
| Input | $3.00/Mtok | $5.00/Mtok |
| Output | $15.00/Mtok | $30.00/Mtok |
| Blended avg | $9.00/Mtok | $17.50/Mtok |
| Cached input | $0.300/Mtok | $0.500/Mtok |
| Specifications | ||
| Context window | 1M tokens | 1M tokens |
| Parameters | Proprietary | Proprietary |
| Speed (TPS) | — | — |
| Modalities | ||
| Input |
textimage
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textimage
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| Benchmarks sources: Artificial Analysis, LMSYS Chatbot Arena (UC Berkeley), Moonshot launch benchmarks / Artificial Analysis, LMSYS Chatbot Arena (UC Berkeley), OpenAI model card | ||
| Avg benchmark score | ||
| Perf / dollar | ||
| GPQA Diamond | 93.5 | 94.6 |
| Providers | ||
| Available from |
Moonshot — $3.00/$15.00/Mtok
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OpenAI — $5.00/$30.00/Mtok
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Cost at scale — 1M tokens (50/50 input/output)
| Volume | Kimi K3 | GPT-5.6 Sol | Savings |
|---|---|---|---|
| 1M tokens | $9 | $17.5 | $8.5 (48.6%) |
| 10M tokens | $90 | $175 | $85 (48.6%) |
| 100M tokens | $900 | $1750 | $850 (48.6%) |
| 1000M tokens | $9000 | $17500 | $8500 (48.6%) |
Summary
Kimi K3 by Moonshot costs $3.00/Mtok input and $15.00/Mtok output, with a 1M-token context window. It supports text, image input.
GPT-5.6 Sol by OpenAI costs $5.00/Mtok input and $30.00/Mtok output, with a 1M-token context window. It supports text, image input.
On a blended cost basis, Kimi K3 is 48.6% cheaper than GPT-5.6 Sol.
On benchmarks, GPT-5.6 Sol scores higher ( vs ) on average. In terms of value, GPT-5.6 Sol has better performance per dollar ( vs ).
Note: Pricing is per million tokens. Actual costs vary with usage patterns, prompt caching, and batch discounts. Always verify against official provider pricing pages.