Last updated: April 5, 2026 · Reviewed by Daniel Ashford

💻 Best LLM for Code Generation (2026)

by Daniel Ashford · Models ranked by weighted code generation capability including debugging, architecture, and test writing.

1
🔥 GPT-5.3 CodexBEST
95.795.2$10/M2
👑 Claude Opus 4
95.596.0$15/M3
⚡ Gemini 2.5 Ultra
92.793.0$7/M4
Claude Sonnet 4
92.793.2$3/M5
GPT-4o
91.391.0$2.5/M6
🆓 Llama 4 405B
88.387.8Free7
Mistral Large 3
88.187.8$4/M8
Qwen 3.5 Plus
86.986.2$2/M9
💰 DeepSeek V3
86.585.5$0.55/M10
Claude Haiku 4.5
84.685.5$0.8/M11
⚡ Gemini 2.5 Flash
81.982.5$0.15/M12
GPT-4o Mini
80.480.5$0.15/M
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❓ Frequently Asked Questions

What is the best LLM for code generation in 2026?

Based on our weighted evaluation, GPT-5.3 Codex ranks #1 with a use-case score of 95.7. Claude Opus 4 and Gemini 2.5 Ultra are strong alternatives.

How are these rankings calculated?

We apply use-case-specific weights to our 6 evaluation dimensions. For code generation, we weight dimensions differently than our overall Index. See full methodology →