Best AI Model for AI-Assisted Coding
Code generation, debugging, refactoring, and code review. Models need strong HumanEval scores and tool-use for IDE integration.
Our Verdict
GPT-5.3 Codex leads with 96.5% HumanEval and 65K output — it's the best pure coding model if you can afford it. Claude Opus 4.6 is the go-to for agentic coding (tool-use + reasoning). For budget coding, o3 at $0.40/$1.60 with 94.5% HumanEval is absurdly good value. Don't pick models based on context window alone — a cheap model with low HumanEval will generate buggy code regardless of how much context it can read.
Top Picks
96.5% HumanEval, 65K output window, purpose-built for code
Best for: Raw code generation quality
Input
$2/1M
Output
$16/1M
Context
200K
Max Output
66K
95% HumanEval + best-in-class tool-use for IDE/agent workflows
Best for: Agentic coding & complex debugging
Input
$5/1M
Output
$25/1M
Context
200K
Max Output
32K
94.5% HumanEval at $0.40/$1.60 — flagship coding quality at budget pricing
Best for: Best value for coding
Input
$0.4/1M
Output
$1.6/1M
Context
200K
Max Output
100K
What Matters for Coding
Key Factors
- •HumanEval score
- •Tool-use support
- •Max output tokens
- •Speed
Tips
- ✓Max output matters — longer code completions without truncation
- ✓Tool-use enables IDE integration (Copilot-style workflows)
- ✓Reasoning models excel at complex debugging but are slower
Full Ranking (All Compatible Models)
| Rank | Model | Input | Output | HumanEval | Score |
|---|---|---|---|---|---|
| #1 | o3OpenAI | $0.40 | $1.60 | 94.5% | 158 |
| #2 | GPT-5.3 CodexOpenAI | $2.00 | $16.00 | 96.5% | 151 |
| #3 | Claude Opus 4.6Anthropic | $5.00 | $25.00 | 95% | 137 |
| #4 | o4-miniOpenAI | $1.10 | $4.40 | 93.5% | 130 |
| #5 | GLM-5Zhipu AI | $1.00 | $3.20 | 91% | 129 |
| #6 | Gemini 2.5 ProGoogle | $1.25 | $10.00 | 93.5% | 127 |
| #7 | Gemini 3.1 ProGoogle | $2.00 | $12.00 | 95% | 127 |
| #8 | GPT-5.2 CodexOpenAI | $1.75 | $14.00 | 95.5% | 127 |
| #9 | Gemini 3 ProGoogle | $2.00 | $12.00 | 94% | 126 |
| #10 | Gemini 2.5 FlashGoogle | $0.15 | $0.60 | 89.5% | 122 |
| #11 | Gemini 3 FlashGoogle | $0.50 | $3.00 | 90% | 119 |
| #12 | DeepSeek R1DeepSeek | $0.55 | $2.19 | 92% | 112 |
| #13 | Claude Sonnet 4.6Anthropic | $3.00 | $15.00 | 94% | 110 |
| #14 | GPT-5OpenAI | $1.25 | $10.00 | 95% | 110 |
| #15 | Claude Sonnet 4.5Anthropic | $3.00 | $15.00 | 93% | 110 |
| #16 | Mistral Large 3Mistral | $2.00 | $5.00 | 91% | 109 |
| #17 | MiniMax M2.5MiniMax | $0.30 | $1.20 | 90% | 106 |
| #18 | Grok 4xAI | $3.00 | $15.00 | 93% | 106 |
| #19 | GLM-4.7Zhipu AI | $0.60 | $2.20 | 85.0% | 98 |
| #20 | Mistral Medium 3Mistral | $0.40 | $2.00 | 87% | 95 |
| #21 | GPT-4oOpenAI | $2.50 | $10.00 | 91% | 92 |
| #22 | DeepSeek V3DeepSeek | $0.14 | $0.28 | 89% | 90 |
| #23 | GPT-4o MiniOpenAI | $0.15 | $0.60 | 87.2% | 87 |
| #24 | Claude Haiku 4.5Anthropic | $0.80 | $4.00 | 88.1% | 85 |
| #25 | Llama 4 MaverickMeta | $0.31 | $0.85 | 90.2% | 82 |
| #26 | Llama 4 ScoutMeta | $0.18 | $0.63 | 86% | 80 |