Best AI models for software development
Coding agents, PR review and refactors across large repositories.
Criteria models with at least 200,000 tokens of context, ranked by the LLM Stats coding index.
- 01GPT-6 AstraOpenAI49.0Coding
- 02GPT-5.6 SolOpenAI46.0Coding
- 03GPT-5.6 TerraOpenAI42.4Coding
| # | Model | Coding |
|---|---|---|
| 01 | GPT-6 AstraOpenAI | |
| 02 | GPT-5.6 SolOpenAI | |
| 03 | GPT-5.6 TerraOpenAI | |
| 04 | Claude Opus 5Anthropic | |
| 05 | Gemini 3.8 FlashGoogle | |
| 06 | Claude Fable 5.1Anthropic |
How it is calculated
- The indexes (overall, reasoning, coding) are the ones LLM Stats publishes; Codifly does not run these tests.
- Prices are each provider's official standard API prices, without caching or batching.
- The blended price weighs 3 input tokens per output token; cost-benefit divides the overall index by that price.
Which one fits your case?
The top of a ranking is not always the most cost-effective at your volume. Estimate your cost or ask us for a written recommendation.
Frequently asked questions
Which is the best AI model for software development?
GPT-6 Astra (49.0) leads this ranking, followed by GPT-5.6 Sol (46.0) · GPT-5.6 Terra (42.4). Data reviewed on Sep 8, 2026.
Which model in this ranking has the best price-performance?
Gemini 3.8 Flash: 34.0 LLM Stats index points per dollar, at a blended price of $1.50 per million tokens.
How is this ranking calculated?
models with at least 200,000 tokens of context, ranked by the LLM Stats coding index. The indexes (overall, reasoning, coding) are the ones LLM Stats publishes; Codifly does not run these tests. Prices are each provider's official standard API prices, without caching or batching. The blended price weighs 3 input tokens per output token; cost-benefit divides the overall index by that price.
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