Best LLM for Coding (2026)
Code generation rewards strong reasoning and a large context window so the model can see your whole file or repo. These are the models developers reach for most, ranked with their API price so you can weigh capability against cost.
Top picks, with price
1. Claude Sonnet 4.6 · Anthropic
The community favourite for agentic coding and refactors. Prompt caching makes repeated repo context cheap.
$3.00 in
$15.00 out
1M ctx
2. GPT-5.4 · OpenAI
Strong coder with a large context — handy for big repos, at a competitive price.
$2.50 in
$15.00 out
400K ctx
3. DeepSeek-V4 Flash · DeepSeek
Best price-to-performance for code. Open weights, a fraction of the cost of flagships.
$0.140 in
$0.280 out
128K ctx
4. Codestral · Mistral
Purpose-built for code completion and fill-in-the-middle, cheap and fast.
$0.300 in
$0.900 out
32K ctx
What to watch out for
- For autonomous agents, output tokens dominate the bill — favour models with low output price.
- Prompt caching (Anthropic, OpenAI, DeepSeek) can cut the cost of repeated file context by 75–90%.
- A 1M-token context only helps if your tooling actually sends it — most editors trim aggressively.
Run your own numbers in the cost calculator, or browse the full price comparison.