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Leaderboard / Anthropic

Claude Opus 4.5

Anthropic High, 32K, 2025-11-01 CLOSED Proprietary
Other settings:2025-11-01 · 70
Verdict

Claude Opus 4.5 is a solid mid-pack model: #71 of 406 by SIscope score. Strongest at following instructions, weaker at math. On the pricey side: costs more than 94% of priced models.

SIscope score
73
#71 of 406
Human-vote rank
#56
of 419 · score 1448
Price per 1M tokens, blended
$10
$5 in · $25 out
Context window
200K
200,000 tokens

Shape

Each spoke is a category, 0 at the centre, 100 at the edge.

CodingAgentsno data yetReasoningMathChatInstructions

Category scores

Percentiles: 90 means better than about 90% of tested models.

Coding76
Agents & toolsNo data yet–
Reasoning & knowledge74
Math65
Chat quality87
Following instructions95

What goes into each category · Compare with DeepSeek V4.1 Flash

Human-vote score over time

Text arena, recent updates.

144014481455Oct 20: 1448.2 (rank #55)Oct 22: 1448.1 (rank #56)Oct 28: 1448.2 (rank #56)Oct 20Oct 28

Coding votes over time

WebDev arena, recent updates.

148514931500Oct 16: 1493.7 (rank #60)Oct 18: 1493.8 (rank #61)Oct 19: 1493.7 (rank #63)Oct 22: 1493.8 (rank #63)Oct 23: 1493.8 (rank #64)Oct 27: 1493.8 (rank #65)Oct 28: 1493.7 (rank #66)Oct 16Oct 28

Independent test runs

Run by Epoch AI on the same harness for every model. Bars show the share of questions answered correctly.

GPQA Diamond86%
PhD-level science multiple choice questions
Better than 72% of 333 tested models. Run Nov 24, 2025.
SimpleQA Verified46%
Short factual questions; rewards not making things up
Better than 60% of 100 tested models. Run Aug 27, 2026.
OTIS Mock AIME 2024-2586%
Competition maths problems in the style of AIME
Better than 67% of 313 tested models. Run Nov 24, 2025.
FrontierMath Tiers 1-334%
Very hard, unpublished research-style maths problems
Better than 41% of 122 tested models. Run Jun 11, 2026.

Human-vote arenas

People compare two anonymous answers and pick the better one. Scores work like chess ratings.

ArenaRankScoreRange (95%)VotesUpdated
Text arena
Everyday chat, blind human votes
#56 of 41914481444–145237,484Oct 28, 2026
WebDev arena
Building web apps, blind human votes
#66 of 15214941485–150210,981Oct 28, 2026
Vision arena
Questions about images, blind human votes
Not on this board yet
Agent arena
Real multi-step agent sessions
Not on this board yet

Source: Arena (formerly LMArena) leaderboard dataset, CC BY 4.0. Fetched Nov 4, 2026.

Price

Input
$5
per 1M tokens
Output
$25
per 1M tokens
Blended
$10
3 in : 1 out, per 1M
Context window
200K
max tokens per request
Speed
Coming soon
our own tests

List price from the OpenRouter models API (anthropic/claude-opus-4.5), Nov 4, 2026. Providers can charge differently.