Anthropic

Claude Opus 4.5

CTX200K

80Quality

Reasoning · Vision · Tools

Input$5/M

Output$25/M

Flagship Claude model for deep reasoning, coding, and long-horizon agents

PaidProprietary706/1044

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AnthropicTextHolo rare

Claude Opus 4.5

Flagship Claude model for deep reasoning, coding, and long-horizon agents

claude-opus-4-5-20251101

Type: Text
Quality: 80 · Top 20% on the Epoch Capabilities Index
Context window: 200,000 tokens
Max output: 64,000 tokens
Input price: $5.00 / 1M tokens
Output price: $25.00 / 1M tokens
Cache read: $0.50 / 1M tokens
Cache write: $6.25 / 1M tokens
Released: Nov 24, 2025
Knowledge cutoff: May 2025
Takes in: Text, Image, PDF
Puts out: Text
Reasoning: Yes
Tool calling: Yes
Structured output: Yes
File attachments: Yes
Access: Paid
License: Proprietary
Rarity: Holo rare
Set number: 706/1044

Open Anthropic docs Quality 80 Where to run it 38 Evolution 1/6 Meet its creature Battle Fugu Ultra

Weights aren’t public. Use is governed by Anthropic’s terms. Specs from models.dev, last changed Oct 19, 2026. Official source: docs.anthropic.com.

How good is it?

Public leaderboard scores for Claude Opus 4.5, refreshed daily from Epoch AI and LMArena.

Top 20% of the 277 models on the Epoch Capabilities Index: #56.

Quality is the share of a leaderboard’s models this one beats, from 0 to 100. Chat models are rated on Epoch AI’s Capabilities Index when it lists them, otherwise on LMArena; image and video models on LMArena’s image and video arenas.

Leaderboards

Epoch Capabilities Index#56 of 277
One number fitted from dozens of hard benchmarks, from science questions to agentic coding.150.2 index
LMArena Text#50 of 416
People compare two anonymous answers and vote for the better one.1,451 rating
LMArena Text · Coding#25 of 411
The text arena’s coding prompts only.1,499 rating
LMArena Text · Math#59 of 400
The text arena’s math prompts only.1,458 rating
LMArena Text · Creative writing#39 of 414
The text arena’s creative writing prompts only.1,443 rating
LMArena WebDev#68 of 145
Each model builds a web app from the same prompt; people pick the better one.1,469 rating

Benchmarks Epoch AI runs

Scores from Epoch AI and LMArena, licensed CC BY 4.0. Boards list models under their own names, so a close match is shown with the name it was scored under. Credits

Where to run it

38 providers sell Claude Opus 4.5 through an API. Prices are per million tokens, cheapest first.

CheapestQiHang$0.71 in · $3.57 out
From the labAnthropic$5.00 in · $25.00 out

API providers

Provider	Input	Output	Context
QiHangCheapest paid`claude-opus-4-5-20251101`	$0.71	$3.57	200K
Poe`anthropic/claude-opus-4.5`	$4.30	$21.00	197K
Jiekou.AI`claude-opus-4-5-20251101`	$4.50	$22.50	200K
302.AI`claude-opus-4-5-20251101`	$5.00	$25.00	200K
Abacus`claude-opus-4-5-20251101`	$5.00	$25.00	200K
AIHubMix`claude-opus-4-5`	$5.00	$25.00	200K
Amazon Bedrock`anthropic.claude-opus-4-5-20251101-v1:0`	$5.00	$25.00	200K
AnthropicOfficial`claude-opus-4-5`	$5.00	$25.00	200K
Azure`claude-opus-4-5`	$5.00	$25.00	200K
Azure Cognitive Services`claude-opus-4-5`	$5.00	$25.00	200K

Show 28 more providers

Provider	Input	Output	Context
Cloudflare AI Gateway`anthropic/claude-opus-4.5`	$5.00	$25.00	200K
Databricks`databricks-claude-opus-4-5`	$5.00	$25.00	200K
DevPass (LLM Gateway)`claude-opus-4-5-20251101`	$5.00	$25.00	200K
Eden AI`anthropic/claude-opus-4-5`	$5.00	$25.00	200K
Helicone`claude-4.5-opus`	$5.00	$25.00	200K
Impossibl`anthropic/claude-opus-4-5`	$5.00	$25.00	200K
Kilo Gateway`anthropic/claude-opus-4.5`	$5.00	$25.00	200K
LLM Gateway`anthropic/claude-opus-4-5-20251101`	$5.00	$25.00	200K
Merge Gateway`anthropic/claude-opus-4-5-20251101`	$5.00	$25.00	200K
NanoGPT`anthropic/claude-opus-4.5`	$5.00	$25.00	200K
Neon`claude-opus-4-5`	$5.00	$25.00	200K
Ofox`anthropic/claude-opus-4.5`	$5.00	$25.00	200K
OpenCode`claude-opus-4-5`	$5.00	$25.00	200K
OpenRouter`anthropic/claude-opus-4.5`	$5.00	$25.00	200K
Opper`claude-opus-4-5`	$5.00	$25.00	200K
OrcaRouter`anthropic/claude-opus-4.5`	$5.00	$25.00	200K
Perplexity Agent`anthropic/claude-opus-4-5`	$5.00	$25.00	200K
Pioneer`claude-opus-4-5`	$5.00	$25.00	200K
Requesty`claude-opus-4-5`	$5.00	$25.00	200K
Tempr Gateway`anthropic/claude-opus-4-5`	$5.00	$25.00	200K
Venice AI`claude-opus-4-5`	$5.00	$25.00	198K
Vercel AI Gateway`anthropic/claude-opus-4.5`	$5.00	$25.00	200K
Vertex`claude-opus-4-5@20251101`	$5.00	$25.00	200K
Vertex (Anthropic)`claude-opus-4-5@20251101`	$5.00	$25.00	200K
ZenMux`anthropic/claude-opus-4.5`	$5.00	$25.00	200K
Cortecs`claude-opus4-5`	$5.31	$26.57	200K
AI/ML API`anthropic/claude-opus-4.5`	$6.88	$34.38	200K
Snowflake Cortex`claude-opus-4-5`	—	—	200K

From models.dev and Hugging Face, checked daily. Resellers’ listings can lag behind their price pages, so confirm with the provider before you commit.

Face off

Current text models from other labs at a similar output price.

Claude Opus 4.5

Claude Opus 4.5

How good is it?

Leaderboards

Benchmarks Epoch AI runs

Where to run it

API providers

Face off

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