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Moonshot AI (Kimi)kimi-k2.6VSOpenAIGPT-5.5 Pro

Analysis by:the whichllmmodel Editorial Team|Updated: June 2026

Our Take

Standardized reasoning and coding benchmarks are currently pending verification for one or both of these models. We recommend testing kimi-k2.6 and GPT-5.5 Pro directly in their respective provider playgrounds to see which fits your specific prompt styles best.
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Model Specs

kimi-k2.6

Open SourceAPI Available

Benchmarks & Scores

Coding (swe-bench-pro)
58.6%

complex codebases, multi-file repositories, and architectural planning

Reasoning (gpqa-diamond)
90.5%

graduate-level science QA

Cost & Context

Cost (per 1M tokens)39.4x cheaper
$1.71Input: $0.95 | Output: $4.00
Context Window
262.14k tokens
Model Specs

GPT-5.5 Pro

Benchmarks & Scores

Coding (swe-bench-pro)
N/A

complex codebases, multi-file repositories, and architectural planning

Reasoning (gpqa-diamond)Winner (+5.7%)
96.2%

graduate-level science QA

Cost & Context

Cost (per 1M tokens)
$67.50Input: $30.00 | Output: $180.00
Context WindowLarger
1.05M tokens

Frequently Asked Questions about kimi-k2.6 vs GPT-5.5 Pro

kimi-k2.6 is cheaper than GPT-5.5 Pro. kimi-k2.6 has a blended cost of $1.71/1M tokens, which is about 39.4x cheaper than GPT-5.5 Pro at $67.50/1M tokens.

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