Claude Opus 4.8

Anthropic's newest Opus-tier model for complex reasoning, long-horizon agentic coding, and high-autonomy enterprise work.

Adaptive ThinkingAgentic CodingFast Mode Preview

Context Window

200k tokens

claude-opus-4-8

Max Output

1M tokens

Input

$4.5$5

10% off

1M tokens

Output

$22.5$25

10% off

1M tokens

Model Codeclaude-opus-4-8

Playground

Model Code

claude-opus-4-8

Reference inputs

Reference Images0/5

Click or drag

Enter your prompt here...

Output

No output yet

Pricing

Plan	Context Window	Max Output	Input	Output	Cache Write	Cache Read
claude-opus-4-8	200k tokens	-	$4.5$510% off 1M tokens	$22.5$2510% off 1M tokens	$5.625$6.2510% off 1M tokens	$0.45$0.510% off 1M tokens

1h Cache Write · $9 · 1M tokens

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

README

Claude Opus 4.8 is Anthropic's latest Opus-tier model, built for complex reasoning, high-autonomy software engineering agents, advanced tool use, and enterprise workflows that need sustained reliability.

Claude Opus 4.8 is designed for high-autonomy work: long-horizon coding agents, complex refactors, multi-step debugging, and enterprise tasks where the model needs to plan, verify, and keep context over extended sessions.
Anthropic highlights adaptive thinking for balancing speed and depth, helping teams use deeper reasoning where it matters while keeping routine work responsive.
The model also introduces a fast mode research preview and a lower 1,024-token cacheable prompt minimum, making it easier to cache reusable system prompts and tool-heavy agent context.

API

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

Anthropic's newest Opus-tier model for complex reasoning, long-horizon agentic coding, and high-autonomy enterprise work.

Model Code

claude-opus-4-8

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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