# Anthropic releases Claude Opus 5.5 with 40% lower costs

Digest AI · Generative AI & Models · published 2026-09-24T16:49:00Z

Canonical: https://digestai.news/story/anthropic-cuts-opus-5-5-costs-by-40-with-caching-and-fewer-tokens

## Summary

Anthropic has released Claude Opus 5.5, a model designed to reduce costs for developers using long-running, context-heavy coding sessions. The company estimates the new model costs about 40% less to run than Opus 5 for typical workloads billed by token. This reduction is driven by a 20% cut in input and output token prices and a 60% drop in the cost of cached tokens, which now make up the majority of agentic coding expenses.

The release coincides with a shift in developer behavior, where context per request has increased roughly 2.6x in the last six months. Anthropic reports that cache misses have decreased by more than 50% due to improved harness features, such as the ability to change effort levels without resetting the cache. For API users, a one-hour cache lifetime is now available, and forked subagents can reuse the parent's cache to avoid duplicate costs.

Performance improvements include generating output more than 30% faster than Opus 5. While simple tasks may see similar turn counts, open-ended tasks benefit from fewer turns and tool calls, potentially avoiding wasted tokens on incorrect approaches. Zeta Labs reported nearly half the cost and twice as many completed hard tasks compared to Opus 5, though Anthropic advises developers to measure results on their specific codebases.

## Key points

- Claude Opus 5.5 costs about 40% less than Opus 5 for typical token-billed workloads.
- Input and output token prices dropped 20%, while cached token prices fell 60%.
- The model generates output more than 30% faster than Opus 5.

## Why it matters

Lower costs for long-context coding sessions make agentic AI more viable for enterprise developers. The significant reduction in cached token prices directly addresses the rising expense of complex, multi-turn coding tasks.

## Sources

1. [Coding sessions are longer and use more context. Claude Opus 5.5 is built with that in mind.](https://claude.com/blog/claude-opus-5-5-built-for-coding-sessions-that-use-more-context) (Anthropic Engineering, 2026-09-24, primary source)
2. [How much cheaper is Claude Opus 5.5 really? Decoding the official calculations in English (with Claude Code settings)](https://note.com/nagi_logbook/n/na15aecf31190?hl=en) (note.com, 2026-09-24)

## Cite

Digest AI, "Anthropic releases Claude Opus 5.5 with 40% lower costs", 24 September 2026, https://digestai.news/story/anthropic-cuts-opus-5-5-costs-by-40-with-caching-and-fewer-tokens

---

Written by Digest AI's editorial model from the linked sources; the sources are the record. Headlines, digests and key points are written by Digest AI and may be quoted with a link to the story page. Linked articles belong to their publishers. Terms: https://digestai.news/terms#reuse
JSON: https://digestai.news/story/anthropic-cuts-opus-5-5-costs-by-40-with-caching-and-fewer-tokens.json