WhichAI / Compare / GPT-5.6 Sol vs Kimi K3

GPT-5.6 SolvsKimi K3

GPT-5.6 Sol scores higher on the July 16 index. Full context below: price, context window, strengths and honest limits. Verified July 26, 2026.

GPT-5.6 Sol

Kimi K3

Provider

AA index

58.9

57.1

Released

2026-07-09

2026-07-16

Context

Price $/1M

$5 / $30

$3 / $15

Access

Released July 9, 2026 (rolling out) · API $5/$30 per 1M tokens · up to 750 tok/s on Cerebras

API $3/$15 per 1M tokens ($0.30 cached) · kimi.com chat · open weights announced for 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 new flagship and #1 on the public AA index snapshot: max reasoning effort, programmatic tool calling, and an 'ultra mode' that spins up subagents. The model to beat for hard reasoning and agentic work.

Kimi K3: Moonshot's July 16 flagship: 2.8T-parameter MoE with 1M context and native vision. #3 on the AA index (57.1), best published BrowseComp (91.2%) and #1 Frontend Code Arena at launch - the strongest agentic challenger to the US frontier.

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