# Anthropic — Coding sessions are longer and use more context. Claude Opus 5.5 is built with that in mind.

- Company: Anthropic (anthropic.com)
- Announced: 2026-09-24
- Category: model-update
- Coverage: not counted
- Announcement: yes
- Group: models
- Source: https://claude.com/blog/claude-opus-5-5-built-for-coding-sessions-that-use-more-context
- Record: https://forck.live/items/13726-coding-sessions-are-longer-and-use-more-context-claude-opus-5-5-is-built-with
- Subject: Claude
- Models affected: Claude Opus 5.5
- Pricing: Input and output tokens reduced 20%; cached token price reduced 60%. Cached token on Opus 5.5 costs a fifth of competing models.

Anthropic released Claude Opus 5.5, a model update optimized for long-running coding sessions with higher context usage. The model costs approximately 40% less to run than Opus 5 for typical token-billed workloads, with significant savings on cached token reads. Opus 5.5 generates output more than 30% faster than Opus 5 and can complete open-ended tasks in fewer turns.

## Evidence

Verbatim from https://claude.com/blog/claude-opus-5-5-built-for-coding-sessions-that-use-more-context:

> We estimate Claude Opus 5.5 costs about 40% less to run than Opus 5 for typical workloads billed by token. For developers, exactly how those savings stack up matters. If you pay by the token, you will see the greatest cost difference for longer-running, higher context sessions–the exact type of Claude Code sessions that have become more prevalent in the last six months.

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