Model
Model explorer

Claude Opus 4.8

CLOSED
Anthropic · Claude 4 family · released May 28, 2026

Model id claude-opus-4-8. Introduced 'dynamic workflows' in Claude Code and a 'fast mode' (2.5x speed) priced at $10/$50 per MTok, three times cheaper than prior fast-mode pricing. Regular (non-fast) pricing unchanged from Opus 4.7 at $5/$25. Best-in-class computer-use/browser-agent model at launch (84% on Online-Mind2Web, self-reported).

ReasoningCodingVisionFunction callingTool useAgentic
2794.3
Elo · rank #4
Parameters
Undisclosed
Active params
—
Context
1M tokens
Architecture
Dense transformer, architecture undisclosed; adaptive thinking controlled by a runtime effort parameter (low/medium/high/xhigh/max)
License
Proprietary
Languages
—
API price (in/out)
$5 / $25
Modalities
text · vision
Benchmark results
Bar shows position within the tracked field; marker = field best
Agents' Last ExamAgents45.2%#4
best: GPT-5.6 · 52.7%
Aider PolyglotCoding79.1%#7
best: Claude Opus 4.5 · 89.4%
BrowseCompAgents84.3%#8
best: Kimi K3 · 91.2%
FrontierMath (Tiers 1-3)Math47.2%#7
best: GPT-5.6 · 89.0%
FrontierMath (Tier 4)Math31.3%#5
best: GPT-5.6 · 83.0%
GDPval-AAAgents1890#2
best: Claude Fable 5 · 1932
GPQA DiamondReasoning93.6%#5
best: GPT-5.6 · 94.6%
Humanity's Last ExamReasoning49.8%#6
best: Claude Sonnet 5 · 57.4%
LiveCodeBenchCoding87.8%#13
best: DeepSeek-V4-Pro (Think Max) · 93.5%
MMMUVision86.6%#3
best: Claude Fable 5 · 89.3%
OSWorld-VerifiedAgents83.4%#2
best: Claude Fable 5 · 85.0%
SWE-bench ProCoding69.2%#2
best: Claude Fable 5 · 80.0%
SWE-bench VerifiedCoding88.6%#2
best: Claude Fable 5 · 95.0%
Terminal-Bench 2.0Coding74.6%#12
best: GPT-5.6 · 88.8%
USAMOMath96.7%#1
best: this model · 96.7%
Run it locally
Closed weights — available via API only. No local deployment.
Input / M tok
$5
Output / M tok
$25
Claude 4 family
Elo progression across releases
Claude Opus 4May 20251702.9Claude Sonnet 4May 20251594.8Claude Opus 4.1Aug 20251760.6Claude Sonnet 4.5Sep 20251976.7Claude Haiku 4.5Oct 20251590.8Claude Opus 4.5Nov 20252274.5Claude Opus 4.5 (High)Nov 20252301.0Claude Opus 4.5 (Medium)Nov 20252283.3Claude Opus 4.6Feb 20262459.4Claude Sonnet 4.6Feb 20262437.8Claude Opus 4.7Apr 20262702.0Claude Opus 4.8May 20262794.3
Resources
DOCShttps://platform.claude.com/docs/en/about-claude/models/overviewAPIAvailable via Anthropic API
API price $5/$25 · each benchmark row carries its own source badge (see methodology)