Fermat's Last Token
Cost-reduction layer for Claude Code that runs through a local wrapper and lightweight proxy, pruning older context, compressing tool outputs and providing purpose-built tools, for the Claude Code CLI and VS Code extension against Anthropic or Vertex AI; the company reports 34 to 51 percent lower cost on its own benchmark; sold at $20 a month for unlimited usage or at 10 percent of what it saves, with a 2-week free trial.
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What it does
- Agentic coding
- Code generation
Features 4
- Context pruningOptimizes older context while keeping recent instructions and task state intact.
- Optimized agent toolsPurpose-built tools that do more per call and reduce repeated reads.
- Output compressionCompresses tool outputs and earlier assistant text before cache writes, passing through unchanged when compression is unsafe.
- Own benchmarkReports 34 to 51 percent lower cost on its own benchmark of refactoring sessions (the company's own result).
Sources
- Pricing
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Home page install section: "$20 /mo Unlimited usage, unlimited savings." and "10% metered Pay just 10% of what you saved."
- Description
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Official documentation · 20 Oct 2026
Home page: "Choose between metered billing and flat-rate (unlimited access)."
- What it does
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Official documentation · 20 Oct 2026
Home page: "Choose between metered billing and flat-rate (unlimited access)."
- Sold within
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Sold on its own with a published flat monthly price and a metered option.
- Name
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Official documentation · 20 Oct 2026
Name as published on the product page.
- URL
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Official documentation · 20 Oct 2026
Product page, read 2026-10-20.
- Deployment
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Official documentation · 20 Oct 2026
Home page: Fermat runs Claude Code through a local wrapper and lightweight proxy installed with a one-line script and a browser login, so it is recorded as hybrid.
- Interfaces
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Official documentation · 20 Oct 2026
Home page: "Fermat supports both the Claude Code CLI and the official VS Code extension."
Open Quotient Labs in the directory
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