We're excited to announce that Claude 4.5 Series API, Anthropic's most capable AI model family, is now available on PoYo. Access Claude Opus 4.5, Sonnet 4.5, and Haiku 4.5 through a single API with no waitlist, no approval process, and instant access.
What Makes Claude 4.5 Series Revolutionary
Claude 4.5 represents Anthropic's most significant advancement in AI capabilities, introducing Extended Thinking, industry-leading coding performance, and advanced agentic workflows.
Claude Opus 4.5 - The Most Intelligent Model
Model ID: claude-opus-4-5-20251101
Claude Opus 4.5 is Anthropic's flagship model, designed for the most demanding tasks:
- 80.9% SWE-bench Verified — The first model to cross 80%, making it the benchmark leader for real-world software engineering
- Extended Thinking — Step-by-step chain-of-thought reasoning with preserved thinking blocks across turns
- 200K Context Window — Process entire codebases and long documents
- 64K Max Output — Generate comprehensive code files and detailed analysis
- Advanced Computer Use — Browser and desktop automation for agentic workflows
- Best-in-class Vision — Analyze charts, diagrams, UI screenshots, and visual data
Pricing: $4/1M input tokens, $20/1M output tokens
Claude Sonnet 4.5 - Balanced Performance
Model ID: claude-sonnet-4-5-20250929
Claude Sonnet 4.5 delivers the optimal balance between speed and intelligence:
- 77.2% SWE-bench Verified — Strong coding performance at lower cost
- Extended Thinking Support — Hybrid mode for complex reasoning when needed
- 200K Context Window — Same capacity as Opus for document processing
- Production-Ready — Ideal for everyday development tasks and balanced workloads
Pricing: $2.4/1M input tokens, $12/1M output tokens
Claude Haiku 4.5 - Speed & Cost Efficiency
Model ID: claude-haiku-4-5-20251001
Claude Haiku 4.5 is optimized for high-volume, cost-sensitive applications:
- Fastest in the Series — Minimal latency for real-time applications
- 200K Context Window — Full context capacity at the lowest price point
- Cost-Effective — Ideal for preprocessing, classification, and high-volume tasks
Pricing: $0.8/1M input tokens, $4/1M output tokens
Key Features Across All Claude 4.5 Models
Extended Thinking
Extended Thinking gives Claude enhanced reasoning capabilities for complex tasks. The model performs step-by-step chain-of-thought reasoning, preserving all thinking blocks across multi-turn conversations. You can configure the effort parameter to balance performance with latency and cost.
Dual API Endpoint Support
PoYo supports two endpoints for all Claude 4.5 models:
/v1/chat/completions— OpenAI-compatible endpoint, works with OpenAI SDKs/v1/messages— Anthropic-native endpoint, supports all Anthropic API features
Both endpoints use the same API key and model ID. Switch between them based on your integration needs.
Advanced Tool Use & Computer Use
Claude 4.5 models support sophisticated tool integration:
- Dynamic Tool Discovery — Automatically discover and use tools from large libraries
- Programmatic Tool Calling — Structured function calls with reliable JSON output
- Computer Use — Control browsers and desktop applications for autonomous workflows
Pricing Comparison
| Model | Input Price | Output Price | Best For |
|---|---|---|---|
| Claude Opus 4.5 | $4/1M | $20/1M | Complex reasoning & agents |
| Claude Sonnet 4.5 | $2.4/1M | $12/1M | Balanced performance |
| Claude Haiku 4.5 | $0.8/1M | $4/1M | High volume tasks |
All models include:
- 200K token context window
- 64K max output tokens
- Vision and multimodal input
- /v1/chat/completions and /v1/messages endpoints
No subscription fees — pay only for what you use.
Getting Started with Claude 4.5 API
Step 1: Get API Access
Create your PoYo account and generate your API key in under 2 minutes. No waitlist, no approval process required.
Step 2: Try the Playground
Experience Claude 4.5's Extended Thinking and coding capabilities through our interactive web interface. Test different models and configurations before integrating.
Step 3: Integrate via API
Use the OpenAI-compatible endpoint for drop-in SDK compatibility:
curl --request POST \
--url https://api.poyo.ai/v1/chat/completions \
--header 'Authorization: Bearer YOUR_API_KEY' \
--header 'Content-Type: application/json' \
--data '{
"model": "claude-opus-4-5-20251101",
"messages": [
{"role": "system", "content": "You are a helpful assistant."},
{"role": "user", "content": "Explain quantum computing in simple terms."}
]
}'
Use Cases
Software Development
Accelerate code generation, review, migration, and refactoring with the industry's top coding model. Claude Opus 4.5 handles complex multi-file changes, writes production-ready code, and resolves real-world GitHub issues at 80.9% accuracy.
AI Agent Development
Build autonomous agents that execute long-horizon tasks with sustained reasoning. Claude 4.5's advanced tool use, computer use, and self-improving capabilities make it ideal for complex agentic workflows.
Enterprise Analysis
Power sophisticated analysis across regulatory filings, market reports, and internal data. Claude Opus 4.5 excels at predictive modeling, compliance analysis, and connecting insights across complex information systems.
Document Processing
Process long documents, legal contracts, research papers, and multi-file reports with the 200K context window. Get detailed summaries, extractions, and cross-document analysis.
Research & Education
Leverage Extended Thinking for complex reasoning tasks in research, mathematics, and scientific analysis. Claude 4.5 provides step-by-step explanations for nuanced academic content.
Why Choose PoYo for Claude 4.5 API
Instant Access
Start using Claude 4.5 API in under 2 minutes. No waitlist, no approval process, no enterprise contracts required.
Competitive Pricing
Access the full Claude 4.5 Series starting from $0.8/1M input tokens with Haiku. No subscription fees — pay only for what you use.
Production-Grade Reliability
99.9% uptime SLA with automatic failover and traffic spike handling. Built for enterprise applications requiring consistent performance.
OpenAI SDK Compatible
Use your existing OpenAI SDK code by simply changing the base URL. Minimal code changes required for migration.
Ready to start building with Claude 4.5? Get your API key and access Anthropic's most capable models today.
For developers ready to integrate, explore our comprehensive API documentation with examples in Python, JavaScript, and cURL.
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