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Claude Opus 5.5: AI大規模言語モデル

Claude Opus 5.5 is Anthropic's next-generation Opus model for complex coding, long-context reasoning, and agentic workflows, at a lower price than Opus 5. Supports text and image inputs. Token-based pricing: $4.00/M input tokens, $20.00/M output tokens. Two endpoints: standard async (/claude-opus-5-5) and live streaming (/claude-opus-5-5/stream) via SSE.

インタラクティブなモデルコントロール

Claude Opus 5.5 is Anthropic's next-generation Opus model for complex coding, long-context reasoning, and agentic workflows, at a lower price than Opus 5. Supports text and image inputs. Token-based pricing: $4.00/M input tokens, $20.00/M output tokens. Two endpoints: standard async (/claude-opus-5-5) and live streaming (/claude-opus-5-5/stream) via SSE.

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概要

このモデルについて

Claude Opus 5.5 is Anthropic's next-generation Opus model, built for complex coding, long-context reasoning, and agentic workflows, at a lower price than Opus 5. It delivers top-tier debugging, code review, and large-context performance — ideal for the most demanding engineering and knowledge-work tasks. Pricing: $4.00 per million input tokens and $20.00 per million output tokens — matches official Anthropic pricing.

1Complex Coding: Tackle large refactors, architecture decisions, and multi-file engineering tasks.
2Deep Research: Synthesize and reason across long documents, papers, and extensive context.
3Agentic Pipelines: Power autonomous agents that require the highest reliability and reasoning depth.
4Knowledge Work: Complex analysis, legal review, financial modeling, and expert-level writing.
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料金と価値

コスト分析

muapiapp$4.00/M 入力トークン, $20.00/M 出力トークン

トークン課金。1回あたり最低 $0.0006。Anthropic公式料金に準じています。

Anthropic (official)$4.00/M 入力トークン, $20.00/M 出力トークン

Official pricing via api.anthropic.com.

Fal.ai利用不可

Claude Opus 5.5 は Fal.ai では利用できません。

** 競合サービスの料金は類似のモデル構成および利用ティアに基づいて算出された推定値です。

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技術詳細

設定スキーマ

プロンプトstring

生成プロセスを適切に制御するためのパラメータ設定（The user message or instruction.）。

デフォルト値Review this code and suggest improvements for performance and readability.
画像 URLstring

処理の開始点となる入力元画像のURLまたはBase64データ。

デフォルト値undefined
System プロンプトstring

生成プロセスを適切に制御するためのパラメータ設定（Optional system-level instruction to guide model b）。

デフォルト値You are an expert software architect.
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実装ガイド

開発者ドキュメント

Standard (Async)

POST /api/v1/claude-opus-5-5 — returns request_id, poll for result via /api/v1/predictions/{id}/result.

Streaming (SSE)

POST /api/v1/claude-opus-5-5/stream — returns a live SSE stream. Each chunk: data: {"choices":[{"delta":{"content":"text"}}]}, ending with data: [DONE].

See Streaming Documentation for full code examples.

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よくある質問

FAQ

How is pricing calculated?

Pricing is token-based: $4.00 per million input tokens and $20.00 per million output tokens. The minimum charge per call is $0.0006. Actual cost is deducted after each call based on token counts returned by the model.

When should I use Opus 5.5 vs Opus 5 or Sonnet?

Use Opus 5.5 for the most complex tasks requiring deep reasoning, large codebases, or maximum reliability, at a lower cost than Opus 5. Use Sonnet for faster responses and everyday tasks — it offers a better cost/performance trade-off for most use cases.

Does Claude Opus 5.5 support images?

Yes. Pass an image_url in the request body to include an image as part of the user message.