WhichAI / Compare / GPT-5.6 Sol vs Kimi K3

GPT-5.6 SolvsKimi K3

GPT-5.6 Sol scores higher on the October 14, 2026 index. Full context below: price, context window, strengths and honest limits. Verified October 14, 2026.

GPT-5.6 Sol

Kimi K3

Provider

AA index

43.6

Released

2026-07-09

2026-07-16

Context

Price $/1M

$4 / $20

$0.58 / $15

Access

Released July 9, 2026 (rolling out) · API $4/$20 per 1M tokens · up to 750 tok/s on Cerebras

API $0.58/$15 per 1M tokens ($0.30 cached) · free kimi.com chat · open weights on Hugging Face (July 27, Modified MIT)

n/a = not published or not yet verified. Scores marked ~ are WhichAI estimates and should not be compared 1:1 with measured scores.

In one line each

GPT-5.6 Sol: OpenAI's July flagship: max reasoning effort, programmatic tool calling and an 'ultra mode' that spins up subagents. Since GPT-6 Astra arrived at double the output price, Sol is the better-value half of OpenAI's line for agentic work.

Kimi K3: Moonshot's July flagship: 2.8T-parameter MoE, 1M context, native vision, and the best published BrowseComp score (91.2%). The strongest agentic challenger to the US frontier, and the largest model whose weights you can actually download.

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