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GPT-5 Mini vs Kimi K2.5
Comprehensive side-by-side LLM comparison
Kimi K2.5 leads with 4.9% higher average benchmark score. GPT-5 Mini offers 168.6K more tokens in context window than Kimi K2.5. Kimi K2.5 is $17.50 cheaper per million tokens. GPT-5 Mini supports multimodal inputs. Both models have their strengths depending on your specific coding needs.
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OpenAI
GPT-5 mini, released by OpenAI in August 2025, is a smaller variant from the GPT-5 family that inherits GPT-5's unified reasoning architecture and multimodal capabilities at a reduced inference cost. It targets high-volume production use cases requiring a balance of intelligence and response speed, offering GPT-5 capabilities for applications where full GPT-5 inference costs are a concern.
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Moonshot AI
Kimi K2.5, released by Moonshot AI in January 2026, is an updated Mixture-of-Experts large language model with 1 trillion total parameters and 32 billion active parameters. It builds on Kimi K2 with improved coding performance across multiple languages and an expanded context window. Kimi K2.5 targets agentic development workflows, polyglot code generation, and open-source deployments requiring large-scale MoE reasoning.
5 months newer
GPT-5 Mini
OpenAI
2025-08
Kimi K2.5
Moonshot AI
2026-01
Pricing Comparison
Cost per million tokens (USD)
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GPT-5 Mini
Input:$5.00
Output:$20.00
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Kimi K2.5
Input:$1.50
Output:$6.00($17.50 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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GPT-5 Mini
Average Score:19.4%
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Kimi K2.5
Average Score:24.4%(+4.9%)
Performance comparison across key benchmark categories
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GPT-5 Mini
Reasoning19.4%
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Kimi K2.5
Reasoning24.4%(+4.9%)
Provider Availability & Performance
Available providers and their performance metrics
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GPT-5 Mini
1 providers
OpenAI
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Kimi K2.5
1 providers
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GPT-5 Mini
Avg Score:19.4%
Providers:1
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Kimi K2.5
Avg Score:24.4%(+4.9%)
Providers:1