What the evidence says
- Developer
- Anthropic
- Released
- May 28, 2026
- Domains
- Language
- Tasks
- Language modeling/generation
- Access
- API access
- Weights
- Closed weights
Across the boards
Each row is one named authority's own current view. Nothing is combined.
- LMArena overall
- 1474.4 · rank #20 · 30,670 battles · published July 20, 2026 · board
- LMArena coding arena
- 1530.7 · rank #8 · board
- LMArena creative writing arena
- 1459.4 · rank #17 · board
- LMArena instruction following arena
- 1477.9 · rank #12 · board
- LMArena hard prompts arena
- 1505.8 · rank #11 · board
- LMArena multi-turn arena
- 1499.4 · rank #9 · board
- LMArena long queries arena
- 1500.4 · rank #8 · board
- LMArena math arena
- 1478.0 · rank #19 · board
- LMArena vision arena
- 1291.3 · rank #15 · board
- LMArena search arena
- 1207.7 · rank #8 · board
- LMArena document arena
- 1468.9 · rank #11 · board
Platform facts
OpenRouter's platform listing, retrieved July 22, 2026. Routed platform prices, not first-party provider prices.
- Input price
- $5.00 per 1M tokens
- Output price
- $25.00 per 1M tokens
- Context length
- 1,000,000 tokens
- Listed on OpenRouter
- May 27, 2026
Common questions
What is Claude Opus 4.8?
Claude Opus 4.8 is a Anthropic model released May 28, 2026, according to Epoch AI's reviewed catalog record. The record classifies it under language.
How does Claude Opus 4.8 rank on LMArena?
In the LMArena style-controlled text snapshot published July 20, 2026, Claude Opus 4.8 holds official rank 20 with a rating of 1474.4 across 30,670 battles.
What does Claude Opus 4.8 cost?
OpenRouter lists it at $5.00 per million input tokens and $25.00 per million output tokens, retrieved July 22, 2026. Those are the platform's routed prices, not first-party provider prices.