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GPT-4.1 vs Kimi K2.5
Comprehensive side-by-side LLM comparison
GPT-4.1 offers 768.6K more tokens in context window than Kimi K2.5. Kimi K2.5 is $2.50 cheaper per million tokens. GPT-4.1 supports multimodal inputs. Both models have their strengths depending on your specific coding needs.
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OpenAI
GPT-4.1, released by OpenAI in April 2025, is a large language model from the GPT-4 family optimized for coding, precise instruction following, and long-context tasks. It features a 1M token context window and native image understanding, with improved performance on tool-calling and web development benchmarks compared to GPT-4o. GPT-4.1 targets software development workflows, long-document analysis, and applications requiring accurate, instruction-adherent outputs.
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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.
8 months newer
GPT-4.1
OpenAI
2025-04-14
Kimi K2.5
Moonshot AI
2026-01
Pricing Comparison
Cost per million tokens (USD)
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GPT-4.1
Input:$2.00
Output:$8.00
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Kimi K2.5
Input:$1.50
Output:$6.00($2.50 cheaper)
Performance Metrics
Context window and performance specifications
Provider Availability & Performance
Available providers and their performance metrics
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GPT-4.1
1 providers
OpenAI
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Kimi K2.5
1 providers
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GPT-4.1
Avg Score:0.0%
Providers:1
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Kimi K2.5
Avg Score:0.0%
Providers:1