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Opus 4.8 Review

Anthropic's Claude Opus 4.8, released on May 28, 2026, is an intelligent and capable large language model designed for complex, agentic tasks and professional knowledge work.

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Opus 4.8 - AI tool

Why it matters

1Released on May 28, 2026, as an upgrade to Opus 4.7.
2Achieved a SWE-bench Pro score of 69.2% and an 84% score on Online-Mind2Web.
3Features a 1 million token context window for extensive document analysis.
4Input tokens are priced at $0.005 per 1,000, and output tokens at $0.025 per 1,000.

Stork’s verdict on Opus 4.8

Opus 4.8 handles complex agentic workflows and advanced coding, but its enterprise focus means it's likely overkill for simpler tasks.

Opus 4.8 reviewed by Stork AI · stork.ai/en/opus-4-8

Specs

API Docs

View Documentation →

API Available

Yes, public API

overview

What is Opus 4.8?

Opus 4.8 is a premium AI model tool developed by Anthropic that enables professional software engineers, enterprise users, and developers to handle complex agentic workflows and high-stakes enterprise tasks. It is designed for advanced coding, deep research, and multi-day project management. Claude Opus 4.8, the latest iteration of Anthropic's flagship AI model, was launched on May 28, 2026. This model is engineered for highly demanding applications, providing robust capabilities across various professional domains. Its core functionality includes delivering production-ready code, planning complex operations, and operating reliably within large codebases. Opus 4.8 also powers production agentic workflows, orchestrating multi-tool tasks with consistent reliability and learning across sessions. For enterprise users, it excels in managing complex, multi-day projects, including document drafting, data analysis, presentations, and financial analysis, by maintaining context across sessions. The model's 1 million token context window allows for deep synthesis of information from lengthy documents, PDFs, and diagrams.

features

Key Features of Opus 4.8

Opus 4.8 incorporates several advanced features designed to enhance its utility for complex professional tasks and agentic workflows.

  • API access for integration into custom applications and development environments.
  • Advanced coding capabilities, including production-ready code generation, large refactors, multi-file feature work, and pull request reviews.
  • Support for complex agentic workflows, orchestrating multi-tool tasks, long-running work, and dynamic workflows with parallel subagents.
  • Management of high-stakes enterprise tasks, such as complex, multi-day projects, spreadsheets, slides, documents, and financial-document workflows.
  • Extensive knowledge work, including deep research, analysis, strategic marketing work, and long-context analysis.
  • Tool use integration with platforms like Playwright, Cloud CLI, Kubernetes CLI, and browser-agent models.
  • Effort control settings for API responses and rate limit management, allowing users to balance speed, cost, and output quality.
  • A 1 million token context window for comprehensive analysis and synthesis of information from lengthy documents.
  • Enhanced reliability and self-diagnosis metrics, reducing failures to flag its own code errors from 19.7% (Opus 4.7) to 3.7%.
  • Mid-conversation system messages in the API, enabling developers to update instructions dynamically within a task without breaking the prompt cache.

use cases

Who Should Use Opus 4.8?

Opus 4.8 is specifically engineered for professionals and organizations requiring a highly intelligent and reliable AI model for demanding applications.

  • Professional Software Engineers: For advanced coding tasks, architecture planning, production debugging, migration projects, and pull request reviews.
  • Developers Building AI Solutions: For orchestrating complex agentic workflows, integrating multi-tool tasks, and developing long-running AI applications.
  • Enterprise Users and Operations Managers: For managing complex, multi-day projects, data analysis, presentations, and financial document workflows.
  • Legal and Tax Professionals: For deep research, contract review, and comprehensive analysis of lengthy legal or financial documents.
  • Marketers: For strategic marketing work, long-context analysis, and generating high-quality content based on extensive research.

pricing

Opus 4.8 Pricing & Plans

Opus 4.8 operates on a freemium model with usage-based pricing for its API, consistent with its predecessor, Opus 4.7. Users can access a freemium version via claude.ai and Cowork, which includes 'effort control' settings to manage response speed, cost, and output quality. For API usage, pricing is structured per token.

  • Standard Usage: $5 per million input tokens and $25 per million output tokens.
  • Fast Mode: $10 per million input tokens and $50 per million output tokens, offering approximately 2.5 times the standard speed and being three times cheaper than previous Opus models' fast mode.
  • Cost Optimization: Users can achieve up to 90% cost savings through prompt caching strategies.
  • API Rate Limits: Specific numerical rate limits are not publicly disclosed, but users can influence rate limit consumption via 'effort control' settings.

Similar Tools

Opus 4.8 vs Competitors

Opus 4.8 is positioned as Anthropic's most capable generally available model, demonstrating strong performance against leading AI models in various benchmarks and use cases.

1
ChatGPT (OpenAI)On StorkCompare

Offers a highly versatile conversational AI for a wide range of tasks, from content generation to complex reasoning and coding assistance.

Like Opus 4.8, ChatGPT is a powerful general-purpose large language model (LLM) capable of complex problem-solving and coding, often compared directly in benchmarks for its reasoning capabilities. Its freemium model provides broad access, similar to Opus 4.8.

2
ClickUp AIOn StorkCompare

Provides an all-in-one work management platform with integrated AI for tasks, documents, goals, and project insights, centralizing knowledge and automating workflows.

While Opus 4.8 is a foundational AI model, ClickUp AI is an application layer that leverages AI (including Claude models) to solve project management and workflow problems. Both offer freemium access, but ClickUp focuses on structured work management and issue resolution within a collaborative environment.

3
Notion AIOn StorkCompare

Integrates AI directly into a flexible workspace for note-taking, document creation, and knowledge management, making AI contextual to user content and projects.

Notion AI, similar to ClickUp AI, embeds powerful LLMs (including Claude Opus 4.8) within a broader productivity platform, focusing on contextual problem-solving within a user's knowledge base. Opus 4.8 is the underlying model, while Notion AI is the application leveraging such models for problem-solving in a collaborative document environment.

4
ProjectLibre Cloud AI↗

Specializes in AI-powered project scheduling and management, automatically generating projects, tasks, links, and timelines.

ProjectLibre Cloud AI offers a more specialized approach to problem-solving within project management, directly automating complex planning and issue identification. Opus 4.8 is a more general-purpose problem-solving LLM that could assist in project planning, but ProjectLibre provides a dedicated AI-driven solution for project complexities with a freemium model.

5
Miro AIOn StorkCompare

Enhances visual collaboration and diagramming with AI, enabling users to generate and edit flowcharts, mind maps, and other diagrams from prompts.

Miro AI provides a visual and collaborative environment for problem-solving and addressing interconnected issues, leveraging various AI models (including Claude Opus) for diagrammatic and ideation tasks. Opus 4.8 is a core reasoning engine, while Miro AI applies such engines to visual problem-solving, both offering freemium access.

See every Opus 4.8 alternative, compared→
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