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Anthropic releases Opus 5.5, Sonnet 5.5, and Haiku 5.5 models

By PulseAugur Editorial · [1 sources] ·

Anthropic has released new versions of its Claude models: Opus 5.5, Sonnet 5.5, and Haiku 5.5. Opus 5.5, priced at $4 per million input tokens and $20 per million output tokens, is positioned for complex tasks like long-running agentic coding and debugging across multiple files, offering a 2x premium over Sonnet 5.5. The models support five effort levels—low, medium, high, xhigh, and max—which influence thinking depth, latency, and token consumption. Opus 5.5 features a 1M-token context window and adaptive thinking that is always on, with effort being the primary control for its processing depth. AI

IMPACT New model releases with tiered pricing and effort levels may influence enterprise adoption strategies and cost-optimization for AI workloads.

RANK_REASON New model releases from a frontier lab (Anthropic) with version numbers. [lever_c_demoted from frontier_release: ic=1 ai=1.0]

Read on dev.to — Claude Code tag →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Anthropic releases Opus 5.5, Sonnet 5.5, and Haiku 5.5 models

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New model releases from a frontier lab (Anthropic) with version numbers. [lever_c_demoted from frontier_release: ic=1 ai=1.0]
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COVERAGE [1]

  1. dev.to — Claude Code tag TIER_1 English(EN) · Anup Karanjkar ·

    Opus 5.5 in Claude Code: Effort, Settings, CLAUDE.md Rules

    <p><strong>Opus 5.5 costs $4 per million input tokens and $20 per million output tokens, exactly double Sonnet 5.5, and Claude Code runs it at <code>medium</code> effort unless you say otherwise.</strong><a href="https://platform.claude.com/docs/en/models/opus-5-5/overview" rel="…

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