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GPT-5 vs Kimi K2
Comprehensive side-by-side LLM comparison
GPT-5 leads with 18.2% higher average benchmark score. GPT-5 offers 168.6K more tokens in context window than Kimi K2. Kimi K2 is $146.90 cheaper per million tokens. GPT-5 supports multimodal inputs. Overall, GPT-5 is the stronger choice for coding tasks.
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OpenAI
GPT-5, released by OpenAI on August 7, 2025, is a large language model that combines direct generation and extended reasoning in a single unified system with a built-in routing mechanism. It features a 400K token context window, 128K maximum output tokens, native multimodal support (text, image, audio, video), and demonstrated strong results across coding, mathematics, visual understanding, and health benchmarks at release. GPT-5 targets complex multi-step tasks including advanced coding, mathematical problem solving, and long-context analysis.
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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.
27 days newer
Kimi K2
Moonshot AI
2025-07-11
GPT-5
OpenAI
2025-08-07
Pricing Comparison
Cost per million tokens (USD)
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GPT-5
Input:$30.00
Output:$120.00
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Kimi K2
Input:$0.60
Output:$2.50($146.90 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 2 common benchmarks
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GPT-5
Average Score:62.3%(+18.2%)
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Kimi K2
Average Score:44.1%
Performance comparison across key benchmark categories
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GPT-5
Agents80.0%(+15.7%)
Tool Use44.5%(+20.6%)
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Kimi K2
Agents
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Knowledge Cutoff
Training data recency comparison
GPT-5
2025-05
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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GPT-5
1 providers
OpenAI
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Kimi K2
1 providers
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GPT-5
Avg Score:62.3%(+18.2%)
Providers:1
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Kimi K2
Avg Score:44.1%
Providers:1