+
+
+
+
+
+
+
+
VS
VS
VS
VS
VS
VS
GPT-5.3 Codex vs Kimi K2 Thinking
Comprehensive side-by-side LLM comparison
. Both models have their strengths depending on your specific coding needs.
+
+
+
+
OpenAI
GPT-5.3 Codex, released by OpenAI in February 2026, is a coding-specialized large language model from the GPT-5.3 family. It targets software engineering workflows including automated code generation, test writing, and agentic multi-file editing, built on the incremental improvements of the GPT-5.3 generation.
+
+
+
+
Moonshot AI
Kimi K2 Thinking, released by Moonshot AI on November 6, 2025, is a reasoning-focused variant of Kimi K2 with 1 trillion total parameters and 32 billion active parameters, featuring extended chain-of-thought processing for complex problem solving. It builds on K2's agentic coding strengths with additional capabilities for mathematical and scientific reasoning. Kimi K2 Thinking targets open-source deployments requiring deep, deliberate reasoning across coding and analytical domains.
2 months newer
Kimi K2 Thinking
Moonshot AI
2025-11-06
GPT-5.3 Codex
OpenAI
2026-02
Performance Metrics
Context window and performance specifications
Provider Availability & Performance
Available providers and their performance metrics
+
+
+
+
GPT-5.3 Codex
0 providers
+
+
+
+
Kimi K2 Thinking
1 providers
Moonshot AI
+
+
+
+
GPT-5.3 Codex
Avg Score:0.0%
Providers:0
+
+
+
+
Kimi K2 Thinking
Avg Score:0.0%
Providers:1