What does Claude Opus 5.5 cost?

Claude Opus 5.5 is priced at $20 output and $4 input (USD per 1M tokens)

How large is the context window of Claude Opus 5.5?

Claude Opus 5.5 has a 1M Tokens context window with up to 128K Tokens output.

Where can I access Claude Opus 5.5?

Official channels: Website and API platform.

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Anthropic

Claude Opus 5.5

AClosed

Anthropic's latest flagship Opus-tier model, released on September 22, 2026, matches Claude Fable 5.1 on most tasks while costing about 40% less to run than Opus 5. It focuses on long-horizon, highly autonomous agents, building/debugging/refactoring/code review for large-scale codebases, and end-to-end enterprise workflows; it supports cross-session memory learning, sub-agent orchestration, and Fast mode (up to 2.5x speed).

API Pricing

Input

Output

$20

Cached input

$0.2

Peak hours

—

USD / 1M tokens

※ Official product page (anthropic.com/claude/opus, verified 2026-10-24): input $4 / cache read $0.2 / output $20 per million tokens, 20% lower than Opus 5, with cache reads 60% cheaper; Fast mode $8/$40; US-based inference billed at 1.1x; Batch at 50% off

Price sourceanthropic.com ↗openrouter.ai ↗· verified 2026-10-24

No price change in the last two snapshots

Price history

12 snapshots · 2026-04-28 → 2026-08-17

Current: $30Period low: $30 (2026-04-28)Period high: $30 (2026-04-28)First tracked: $30 (2026-04-28)

Specifications

Context window: 1M Tokens
Max output: 128K Tokens
Input modalities: Text · Image
License: Closed

Overall score

Total

65.3

Rank

Tier

Data confidence

94%

Capability100

Scale36.5

Value34

Context60.5

Ecosystem36

Freshness89.4

Capabilities & use cases

vs_Claude_Fable_5.1 Parity on most workloadsvs_Opus_5_cost Typical workload cost -40%

Key capabilities

Adaptive Thinking
Fast Mode (2.5x)
Memory across sessions
Subagent orchestration
US-only inference option

Best for

Large-scale codebase agent programming
End-to-end enterprise workflows
Long-horizon autonomous agents
Knowledge work and professional documents

Official links

Website ↗API platform ↗Pricing page ↗Open in comparator ↗

Same vendor

Claude Sonnet 5.5 Claude Haiku 5.5 Claude Fable 5.1 Claude Opus 4.8

FAQ

What does Claude Opus 5.5 cost?: Claude Opus 5.5 is priced at $20 output and $4 input (USD per 1M tokens)
How large is the context window of Claude Opus 5.5?: Claude Opus 5.5 has a 1M Tokens context window with up to 128K Tokens output.
Where can I access Claude Opus 5.5?: Official channels: Website and API platform.

Data is refreshed daily and cross-checked against two independent sources; please confirm pricing and specs on the vendor page.