Mercury Edit
Ultra-fast AI code editing model that generates code at 1,000+ tokens per second.
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What is Mercury Edit?
Mercury Edit is a diffusion-based language model from Inception Labs built specifically for code editing. Unlike autoregressive models, it generates entire code blocks in parallel — achieving speeds of 1,000+ tokens per second, which is 5× faster than comparable GPT-class models. This makes it particularly well-suited for IDE autocomplete, fill-in-the-middle completions, and next-edit prediction. It is OpenAI API-compatible, meaning it works as a drop-in replacement in any IDE or toolchain that supports the OpenAI format. Mercury Edit is available on AWS Bedrock and Azure AI Foundry, with 10 million complimentary tokens for new accounts.
Pros & Cons
👍 Pros
- ✓5× faster than comparable autoregressive models
- ✓OpenAI-compatible API — zero integration friction
- ✓Available on major cloud marketplaces (AWS, Azure)
👎 Cons
- ✗Developer API only — no consumer-facing product
- ✗32K context window is smaller than many general-purpose LLMs
- ✗No affiliate or reseller program
Key Features
- ✓ Diffusion-based architecture (not autoregressive)
- ✓ 1,000+ tokens/second generation speed
- ✓ Fill-in-the-middle (FIM) autocomplete
- ✓ Next-edit prediction using recent edit history
- ✓ 32K context window
- ✓ OpenAI API-compatible (drop-in replacement)
- ✓ Available on AWS Bedrock and Azure AI Foundry
- ✓ Structured output with schema constraints
Mercury Edit Pricing
✅ Mercury Edit has a free plan — no credit card required to start.
Pay-as-you-go
- ✓$0.75/1M output tokens
- ✓$0.025/1M cached input tokens
- ✓32K context window
- ✓Priority support
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