Claude Opus 4.7 Fast

Overview

Claude Opus 4.7 Fast is a latency-optimised variant of Anthropic's Claude Opus 4.7, designed for teams that need Opus-class reasoning at lower response times. It retains the full one-million-token context window of the base model while delivering faster time-to-first-token, making it well-suited for interactive agentic workflows, real-time developer tooling, and pipelines that process large codebases or dependency trees without the patience budget of an offline batch job.

Key Capabilities

• Advanced Reasoning — the same deep reasoning engine as Claude Opus 4.7; handles multi-step problem decomposition, logic chains, and long-horizon planning
• Long Context (1M tokens) — ingest entire monorepo dependency graphs, lock files (package-lock.json, Pipfile.lock, go.sum), or multi-thousand-line build manifests in a single context window
• Tool Use & Function Calling — structured tool invocation with precise instruction-following, ideal for CI/CD agent orchestration
• Vision — high-resolution image processing (up to ~3.75 megapixels), enabling analysis of architecture diagrams, dependency graphs rendered as visuals, and dashboard screenshots
• Memory Across Sessions — improved ability to persist and recall notes across long multi-session runs, useful for incremental dependency audit workflows

Use Cases for Engineering Teams

• Dependency drift detection — scan large package.json, requirements.txt, or pom.xml files to identify packages lagging behind current stable releases, flag breaking version gaps, and propose upgrade paths
• Security triage — cross-reference CVE feeds against a project's full dependency tree; the 1M token window can hold an entire lock file plus vulnerability advisories simultaneously
• CI/CD agent pipelines — lower latency means tighter feedback loops in automated PR review, dependency PR generation, and nightly health-check agents
• Large codebase analysis — parse and reason about import graphs, peer dependency conflicts, and transitive dependency chains across polyglot repositories
• Tech stack health reporting — draft human-readable summaries of drift severity, EOL packages, and upgrade complexity for engineering leadership

Technical Specifications

• Context Window: 1,000,000 tokens
• Pricing: $5 per million input tokens / $25 per million output tokens (same tier as Claude Opus 4.7)
• Open Weight: No
• Release Date: 2026-05-12 (Fast variant; base Claude Opus 4.7 released 2026-04-16)
• API Model ID: claude-opus-4-7 (via Anthropic API, AWS Bedrock, Google Cloud Vertex AI, Microsoft Foundry)

Provider

Claude Opus 4.7 Fast is developed by Anthropic. For the latest documentation and API access, visit the Claude API model overview.