Best LLM API for Coding (2026)
AI coding agents need reliable, fast, and cost-effective LLM APIs. Here is our comparison of the top coding-focused LLM APIs with their current pricing and capabilities.
Claude Sonnet 4.6
Anthropic
Price: $3/$15 per M in/out
Context: 200K
Key: Top coding benchmark scores, strong reasoning, tool use
GPT-5.4 Codex
OpenAI
Price: $1.75/$14 per M in/out
Context: 400K
Key: Purpose-built for code, fill-in-the-middle, large context
DeepSeek V4 Pro
DeepSeek
Price: $1.74/$3.48 per M in/out
Context: 1M
Key: Extremely cost-effective, 1M context, strong reasoning
Qwen Coder
Alibaba
Price: $0.08/$0.55 per M in/out
Context: 262K
Key: Budget-friendly, reasoning-optimized, competitive coding scores
Codestral
Mistral
Price: $0.30/$0.90 per M in/out
Context: 256K
Key: Fill-in-the-middle, fast inference, EU-hosted
Prices and availability subject to change. Verify on provider websites. Affiliate disclosure.