Claude Opus 4.8
Anthropic's premier frontier model, optimized for advanced coding, autonomous agentic loops, and deep reasoning with a massive 1M-token context.
Get API key- Provider
- Anthropic
- Price
- $6 in · $30 out / 1M
- Context window
- 1M tokens
- Released
- May 28, 2026
- License
- Proprietary
What is Claude Opus 4.8?
Claude Opus 4.8 is Anthropic's flagship multimodal reasoning model, released on May 28, 2026. Built for complex agentic workflows, advanced software engineering, and deep document analysis, it introduces 'dynamic workflows' and a massive 1-million-token context window, delivering state-of-the-art honesty and code precision.
Use it privately on Venice
On Venice, you can access Claude Opus 4.8 with zero prompt retention. While served via an anonymized third-party pipeline where Venice forwards requests without personal identifiers, it provides a private alternative to standard Big Tech surveillance. You gain access to elite reasoning, vision, and web search without building a permanent digital dossier.
What can it do?
- •Elite coding performance, scoring 69.2% on SWE-Bench Pro, outperforming GPT-5.5.
- •Highly reliable agentic execution with 'dynamic workflows' for complex, multi-step tasks.
- •Exceptional honesty and calibration, with a 4x reduction in allowing code flaws to pass unremarked compared to Opus 4.7.
- •Massive 1,000K (1M) token context window allowing entire codebases or multi-hundred-page PDFs to be analyzed at once.
- •Native support for vision, web search, and structured JSON outputs.
- •Closed-source and proprietary, lacking the sovereignty of true open-source weights.
- •High inference cost ($6/$30 per 1M tokens) compared to highly capable open-weights models like DeepSeek V3.2.
- •Served via third-party API routing, meaning Venice must forward anonymized requests rather than running it on zero-retention local hardware.
Claude Opus 4.8 capabilities
- Tool use / function calling
- Vision (image input)
- Reasoning
- Web search
- Code-optimized
- Structured output (JSON schema)
- Audio input
- Video input
- Multiple image inputs
- Log probabilities
How to use it via API
Venice exposes an OpenAI-compatible API. Swap your base URL and call claude-opus-4-8.
curl https://api.venice.ai/api/v1/chat/completions \
-H "Authorization: Bearer $VENICE_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "claude-opus-4-8",
"messages": [{ "role": "user", "content": "Explain quantum tunneling simply." }]
}'Specifications
Pricing
Billed per token on Venice: $6 per 1M input tokens and $30 per 1M output tokens.
New Venice accounts include a free daily allowance and 500 welcome credits — no credit card required.
Claude Opus 4.8 vs alternatives
| Model | Context window | SWE-Bench Pro | Open weights | Price (Venice) |
|---|---|---|---|---|
| Claude Opus 4.8 | 1M tokens | 69.2% | No | $6 in · $30 out / 1M |
| Claude Opus 4.7 | 1M tokens | Unverified | No | $6 in · $30 out / 1M |
| Claude Sonnet 4.6 | 1M tokens | Unverified | No | $3.60 in · $18 out / 1M |
| DeepSeek V3.2 | 160K tokens | Unverified | Yes | $0.33 in · $0.48 out / 1M |
The premier agentic and coding model of the Claude 4 lineup.
What is it good for?
- •Autonomous software engineering and multi-file code refactoring via Claude Code.
- •Deep analysis of massive financial reports, legal documents, or academic papers.
- •Complex multi-step agentic workflows requiring tool use and web search.
- •Visual analysis of complex diagrams, charts, and user interfaces.
Prompting tips
- •Provide full context: take advantage of the 1M context window by uploading entire codebases or reference documents.
- •Use structured XML tags to organize your prompts, which Claude models are natively optimized to parse.
- •Ask the model to think step-by-step or outline its plan before generating complex code to leverage its reasoning capabilities.
Version history
First major Opus 4 release.
Stronger coding and vision.
CurrentCurrent flagship with dynamic workflows.
Frequently asked questions
Claude Opus 4.8 is Anthropic's flagship multimodal AI model, released on May 28, 2026. It is optimized for complex coding, agentic tasks, and long-context reasoning.
On Venice, Claude Opus 4.8 is priced at $6.00 per 1 million input tokens and $30.00 per 1 million output tokens, with cached inputs billed at $0.60 per 1 million tokens.
No, Claude Opus 4.8 is a proprietary, closed-weights model developed by Anthropic. However, Venice users can access it with private, anonymized routing.
Yes, Claude Opus 4.8 natively supports vision (image and PDF input), tool use/function calling, web search, and structured JSON outputs.
Venice forwards your prompts to a third-party provider using anonymized routing. No personal identifiers or prompt histories are stored by Venice, though the third-party provider may retain data per their policies.
Claude Opus 4.8 leads on coding benchmarks (69.2% on SWE-Bench Pro vs 58.6% for GPT-5.5) and long-context retrieval, while GPT-5.5 excels in terminal-centric workflows.
Claude Opus 4.8 features a massive 1,000K (1 million) token context window, allowing it to process massive documents or codebases in a single prompt.
Related models
Run Claude Opus 4.8 privately.
No prompt logging. No data used for training. Free to start — no credit card.
