Claude Opus 4.8 by Anthropic | AI model information

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Model details

Claude Opus 4.8

Anthropic positioned Claude Opus 4.8 as a modest, incremental refinement of the prior Opus generation rather than a dramatic leap. The release emphasized honest self-reporting, with the company noting that the model is around four times less likely than its predecessor to let flaws in code it has written pass unremarked and is more willing to flag uncertainty in its outputs. This honesty framing was reinforced through improvements targeting long-running agents, coding, enterprise workflows, financial analysis, cybersecurity, and multimodal reasoning, making the model well suited to complex knowledge work where reliability matters as much as raw capability.

A notable addition is a fast execution mode offering higher output throughput, which broadens the model's fit for latency-sensitive agentic pipelines while preserving the standard quality-oriented path for deeper reasoning tasks. Availability on Amazon Bedrock and the Claude Platform on AWS was confirmed at launch, giving enterprise teams immediate options for deployment. Subsequent platform documentation describing Claude Opus the listed price as a step-change improvement over Opus 4.8 underscores that 4.8 served as a stable, honesty-focused bridge release for production coding and agent workloads.

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Quick Info

Provider: Anthropic
Model key: claude-opus-4-8
Release date: May 28, 2026
Last updated: May 28, 2026
Knowledge cutoff: 2026-01
Input modalities
Output modalities
Capabilities

Cost

Input token cost: $5.00
Output token cost: $25.00

Limits

Output tokens: 128,000 tokens
Context window: 1,000,000 tokens

OpenCode

Model variants

Fast

Input

$10.00

per 1M tokens

Output

$50.00

per 1M tokens

Cache Read

$1.00

per 1M tokens

Cache Write

$12.50

per 1M tokens

Latest news about Claude Opus 4.8

Anthropic

Official sourceAnnouncement

Anthropic officially introduced Claude Opus 4.8 on May 28, 2026, describing it as an upgrade over Opus 4.7 with improvements across benchmarks and as a "more effective collaborator." The model launches at the same price as its predecessor and ships alongside several new platform features: users on claude.ai now have co Anthropic positions Opus 4.8 as a more reliable agentic collaborator, with early testers reporting sharper judgment, better plan pushback, and improved multi-service exploration confidence. According to supplied evidence, Claude Opus 4.8 is described as the only model to complete every case end-to-end on the Super-Agen

Anthropic

CoverageRelease Notes

Explore Claude Opus 4.8, Anthropic's most capable generally available model to date, with improvements around long-running agents, coding, enterprise workflows, financial analysis, cybersecurity, and multimodal reasoning.

Anthropic

Coverage

A Mythos-class model is expected in the coming weeks.

Anthropic

CoverageRelease Notes

Anthropic released **Claude Opus 4.8** on May 28, 2026, as an incremental but material upgrade to its Opus line, targeted at coding, agentic workflows, and complex knowledge work, according to Anthropic's announcement and product docs. The release introduces a `fast` mode that offers up to **2.5x** higher output tokens

Anthropic

Coverage

Today, we're excited to announce the availability of Anthropic's most advanced Opus model, Claude Opus 4.8, on Amazon Bedrock and the Claude Platform on AWS...

Anthropic

Coverage

Anthropic launched Claude Opus 4.8 this week, and Artificial Analysis reports that it narrowly tops the independent Artificial Analysis ...

Anthropic

CoverageRelease Notes

Anthropic's Claude Opus 4.8, released May 28, 2026, arrives less than two months after the previous upgrade, ramping up Anthropic's release cadence, according to 9to5Mac. Anthropic describes it as having "sharper judgement, more honesty about its progress, and the ability to work independently for longer than its prede Supplied benchmark data shows several score gains from Opus 4.7 to 4.8: agentic coding rose from 64.3% to 69.2%, multidisciplinary reasoning with tools moved from 54.7% to 57.9%, agentic computer use increased from 82.8% to 83.4%, knowledge work score climbed from 1753 to 1890, and agentic financial analysis improved f

Anthropic

CoverageRelease Notes

GitHub announced on May 28, 2026 that Claude Opus 4.8 is generally available in GitHub Copilot, describing it as Anthropic's latest Opus model. GitHub's early testing reportedly showed a clear step forward in code understanding and generation across real-world coding tasks, with notable improvement in complex problem-s Claude Opus 4.8 is available to Copilot Pro+, Business, and Enterprise users via the model picker in Visual Studio Code (chat, ask, edit, and agent modes), Visual Studio, Copilot CLI, the GitHub Copilot cloud agent, the GitHub Copilot App, github.com, GitHub Mobile (iOS and Android), JetBrains, Xcode, and Eclipse. Roll