GPT-5.6 Luna alternatives
Looking for an alternative to GPT-5.6 Luna? Here are the 6 closest llm provider / model options for AI coding, each ranked by how well it replaces GPT-5.6 Luna — with the concrete reason to switch.
Quick comparison
| Model | Input price | SWE-bench | Context window | Speed |
|---|---|---|---|---|
| GPT-5.6 Luna (you) | $0.20 | — | 1M+ | Fast |
| Gemini 3.1 Flash-Lite | $0.25 | — | 1M+ | Fast |
| Llama 4 Maverick | Free (self-hosted) | 46% | 1M+ | Fast |
| Claude Haiku 4.5 | $1 | 40% | 200K | Fast |
| DeepSeek V4 Pro | $0.44 | 62% | 1M+ | Slow/Reasoning |
| Codestral | $0.20 | 38% | 256K | Fast |
| Deepseek | $0.27 | 42% | 128K | Standard |
The best GPT-5.6 Luna alternatives
Cost-floor workloads that still need a large context window
Why consider it instead:
- Built for: Cost-floor workloads that still need a large context window
Latest open-weights from Meta, large context, self-hosted coding with vision
Why consider it instead:
- Cheaper — $0/1M input vs $0.2
High-volume quick tasks, cost-sensitive agentic loops, inline completions
Why consider it instead:
- Built for: High-volume quick tasks, cost-sensitive agentic loops, inline completions
Complex reasoning, agentic coding, hard debugging with long context
Why consider it instead:
- Built for: Complex reasoning, agentic coding, hard debugging with long context
Specialized code completion and generation, FIM-aware coding, fast IDE completions
Why consider it instead:
- Built for: Specialized code completion and generation, FIM-aware coding, fast IDE completions
Deepseek
Cheap high-quality coding, bulk classification, self-host for privacy
Why consider it instead:
- Built for: Cheap high-quality coding, bulk classification, self-host for privacy
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