As of August 20, 2026, Kimi K3 is 49% cheaper per million tokens than GPT-5.6 Sol. GPT-5.6 Sol is $5.00 / $30.00 per million input/output tokens versus Kimi K3 at $3.00 / $15.00. Sources: https://developers.openai.com/api/docs/pricing and https://platform.kimi.com/docs/pricing/chat
Sources: OpenAI API pricing (https://developers.openai.com/api/docs/pricing); Moonshot AI pricing (https://platform.kimi.com/docs/pricing/chat)
GPT-5.6 Sol
OpenAI
Input
$5.00
Output
$30.00
Kimi K3
Moonshot AI
Input
$3.00
Output
$15.00
Token pricing, specs, and benchmarks side by side
GPT-5.6 SolKimi K3Verdict
Kimi K3 offers significantly lower pricing, while GPT-5.6 Sol leads on benchmark performance. Your choice depends on whether cost efficiency or raw capability matters more for your use case.
As of August 20, 2026, Kimi K3 is 49% cheaper on blended LLM API pricing. Kimi K3 costs $3.00 per million input tokens and $15.00 per million output tokens ($18.00 blended 1M-in + 1M-out). GPT-5.6 Sol costs $5.00 / $30.00 per million tokens ($35.00 blended). Sources: https://developers.openai.com/api/docs/pricing and https://platform.kimi.com/docs/pricing/chat. The cheapest LLM for your app still depends on how many output tokens you generate.
GPT-5.6 Sol OpenAI API pricing is $5.00 input and $30.00 output per million tokens via OpenAI. Kimi K3 Moonshot AI API pricing is $3.00 input and $15.00 output per million tokens via Moonshot AI. Use those four numbers, not ChatGPT Plus or Claude Pro subscription prices, when you are comparing APIs.
GPT-5.6 Sol leads on SWE-bench Verified: GPT-5.6 Sol at 96.2% vs Kimi K3 at 93.4%. SWE-bench measures real GitHub fixes; LiveCodeBench measures contest programming.
GPT-5.6 Sol supports a 1M token context window, while Kimi K3 supports 1M tokens. GPT-5.6 Sol offers a larger context window. Filling a larger window bills more input tokens, so the cheaper-per-million model can still cost more on long documents.
GPT-5.6 Sol leads on 20 of 36 shared benchmarks versus Kimi K3's 16 wins. Check the comparison table for GPQA Diamond, SWE-bench, MMLU, HLE, and the other evals we track. Token price and benchmark score together are the usual LLM comparison, not either number alone.
Both GPT-5.6 Sol and Kimi K3 are production API models. For cost-sensitive production traffic, Kimi K3 has better economics on the blended 1M-in + 1M-out scale. For maximum capability, weight the benchmark table for your domain. Many production stacks route cheap models for drafts and a frontier model for the hard turn, which is usually cheaper than sending everything to the expensive API.
Yes. Call GPT-5.6 Sol through OpenAI and Kimi K3 through Moonshot AI with separate API keys, or through a gateway that already wraps both. Keep prompts in tokens, not characters, when you estimate the invoice. AnotherWrapper templates can swap providers without rewriting auth and billing.
List rates are the latest published OpenAI API pricing and Moonshot AI API pricing, quoted per million tokens. Official rate sheets: https://developers.openai.com/api/docs/pricing and https://platform.kimi.com/docs/pricing/chat. Prompt caching, batch APIs, and committed-use discounts can change the invoice. Benchmark scores are from official publications and independent evals, updated as new numbers land.
GPT-5.6 Sol supports up to 128K output tokens per request, while Kimi K3 supports up to 1M output tokens. Output tokens are usually the expensive half of API pricing, so a higher max output cap is a capability, not a discount.
GPT-5.6 Sol runs at approximately 26.722697498416323 tokens/second while Kimi K3 runs at 8.253358168863906 tokens/second. GPT-5.6 Sol is faster in raw throughput. Throughput (tokens per second) and time-to-first-token are why two models with the same per-million-token price can still feel different in chat and agents.
Use the model pickers at the top of this LLM comparison. Search any model in the index and the URL updates. Open GPT-5.6 Sol or Kimi K3 from the sidebar for the single-model API pricing page, or go back to the LLM pricing table to sort by cheapest blended cost.
This comparison covers API pricing, context window, throughput, and benchmark scores. GPT-5.6 Sol costs $5.00/M input and $30.00/M output. Kimi K3 costs $3.00/M input and $15.00/M output.
Rank both on the LLM leaderboard, SWE-bench, and Humanity's Last Exam.
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