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Claude Opus 4.8

Anthropic
Model overview

claude-opus-4-8

Anthropic's most capable Opus-tier model for complex reasoning, long-horizon agentic coding, and high-autonomy work.

general LLMreasoningcodingvision-languageagentlong contextchatcode generationsoftware engineering agententerprise access
CompareCompanyRankingsPublic signals
Representative version

claude-opus-4-8

CompanyAnthropic
Release2026-05-28
Release typeModel release
ParametersNot disclosed
ArchitectureNot disclosed
Context1,000,000
Input modalitiestext / image
Output modalitiestext
Tool use / function callingConfirmed: Tool use, Function calling
Structured output / reasoningConfirmed: Reasoning
Vision / audio / videoConfirmed: Vision; Not shown: Audio, Video
Open weights / LicenseNo open weights / license not applicable
anthropic-claude-opus-4-8-current · License not applicable
Vendor APIAvailable
Introducing Claude Opus 4.8anthropic-claude-opus-4-8-current · 2026-05-28
OpenRouterOpenRouter listed
PricingOpenRouter · 2026-07-15: $5 / $25
input / output, per 1M tokens
BenchmarkNo reliable public source
Public signalsNo reliable public source
Use casesComplex reasoning / Long-horizon agentic coding / High-autonomy enterprise workflows / assistant chat
Claim evidenceRelease eventIntroducing Claude Opus 4.8claude-opus-4-8 · 2026-05-28
Model specs / weightsWhat's new in Claude Opus 4.8Claude Opus 4.8 · claude-opus-4-8
OpenRouter

Pricing / context / availability

OpenRouterOpenRouter listed
OpenRouter listinganthropic/claude-opus-4.8
Mapped versionclaude-opus-4-8
anthropic-claude-opus-4-8-current
PricingOpenRouter · 2026-07-15: $5 / $25
input / output, per 1M tokens
Context1000000
Speed/LatencyNo reliable public source
Snapshot time2026-07-15T20:11:41.551Z
SourceView source
Evidence gaps

Public display boundary

Parameter scale not disclosedNo reliable benchmark sourceNo public model-card activity countersNo linkable real reviewSpeed/latency not disclosed