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GPT-5.1 vs Kimi K2
Comprehensive side-by-side LLM comparison
GPT-5.1 leads with 20.6% higher average benchmark score. GPT-5.1 supports multimodal inputs. Overall, GPT-5.1 is the stronger choice for coding tasks.
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OpenAI
GPT-5.1, released by OpenAI in November 2025, is a large language model from the GPT-5 family that delivers incremental improvements in reasoning, instruction following, and multimodal understanding over GPT-5. It features a 400K token context window and targets general-purpose development, long-context analysis, and agentic workflows.
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Moonshot AI
Kimi K2, released by Moonshot AI on July 11, 2025, is an open-weight Mixture-of-Experts large language model with 1 trillion total parameters and 32 billion active parameters per inference. It features a 256K token context window (expanded from 128K in an September 2025 update) and demonstrated strong performance on agentic coding benchmarks. Kimi K2 targets software engineering agents, tool-use workflows, and open-source deployments under a modified MIT license.
3 months newer
Kimi K2
Moonshot AI
2025-07-11
GPT-5.1
OpenAI
2025-11
Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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GPT-5.1
Average Score:44.5%(+20.6%)
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Kimi K2
Average Score:23.9%
Performance comparison across key benchmark categories
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GPT-5.1
Tool Use44.5%(+20.6%)
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Kimi K2
Tool Use23.9%
Provider Availability & Performance
Available providers and their performance metrics
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GPT-5.1
0 providers
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Kimi K2
1 providers
Moonshot AI
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GPT-5.1
Avg Score:44.5%(+20.6%)
Providers:0
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Kimi K2
Avg Score:23.9%
Providers:1