Claude Opus 4.5 (20251101)

Anthropic's Opus 4.5 snapshot for premium intelligence in coding and agentic workflows.

Opus SnapshotPremium IntelligenceAgents & Coding

Context Window

200k tokens

Max Output

MTok

Input

Output

$25

Model Codeclaude-opus-4-5-20251101

Playground

Model Code

claude-opus-4-5-20251101

Reference inputs

Reference Images0/5

Click or drag

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Output

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Pricing

Plan	Context Window	Max Output	Input	Output	Cache Write	Cache Read
Claude Opus 4.5 (20251101)	200k tokens	-	$5	$25	5m: $6.25 1h: $10	$0.50

Official Anthropic pricing for Claude Opus 4.5 on the Claude API.

Prompt caching uses 1.25x for 5-minute writes, 2x for 1-hour writes, and 0.1x for cache reads.

Cache read or cached input pricing applies to reused prompt tokens.

README

Claude Opus 4.5 (claude-opus-4-5-20251101) is an Anthropic Opus snapshot focused on maximum capability for demanding coding, reasoning, and autonomous agent workloads.

Anthropic positions Claude Opus 4.5 as a top-tier model for coding, high-stakes reasoning, and long-horizon agent tasks.
This page uses the snapshot model identifier `claude-opus-4-5-20251101`, which is suited for teams that need explicit version pinning.
Opus 4.5 is designed for cases where quality and reliability matter more than latency or cost efficiency.

API

Use the API docs for request format, parameters, and integration details.

Anthropic's Opus 4.5 snapshot for premium intelligence in coding and agentic workflows.

Model Code

claude-opus-4-5-20251101

View API Docs

API

Endpoint

POST /v1/messages

Authentication

Authorization: Bearer YOUR_REACH_API_KEY
anthropic-version: 2023-06-01
Content-Type: application/json

Example

curl -X POST "https://direct.reachapi.ai/v1/messages" \
  -H "Authorization: Bearer YOUR_REACH_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "YOUR_MODEL_ID",
    "messages": [
      {
        "role": "user",
        "content": "Introduce ReachAPI in one sentence."
      }
    ],
    "max_tokens": 512,
    "temperature": 0.2
  }'

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