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Claude Opus 4.5
claude-opus-4-5-20251101 — Anthropic's most intelligent model. 200K context, 64K output, SWE-bench 80.9%, Extended Thinking. Input: $4/1M tokens, Output: $20/1M tokens.
claude-opus-4-5-20251101
Chat
Model:
Claude 4.5 Series API supports chat and coding for production assistants, coding agents, support tools, and structured reasoning workflows.
Pricing details
Transparent pricing with no hidden fees. Pay as you go.
claude-opus-4-5-20251101Input
PoYo price
$4.00/1M tokens
1000 credits
Official price
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You save
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claude-opus-4-5-20251101Output
PoYo price
$20.00/1M tokens
5000 credits
Official price
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You save
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claude-sonnet-4-5-20250929Input
PoYo price
$2.40/1M tokens
1000 credits
Official price
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You save
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claude-sonnet-4-5-20250929Output
PoYo price
$12.00/1M tokens
5000 credits
Official price
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You save
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claude-haiku-4-5-20251001Input
PoYo price
$0.800/1M tokens
1000 credits
Official price
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You save
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claude-haiku-4-5-20251001Output
PoYo price
$4.00/1M tokens
5000 credits
Official price
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You save
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| Model | Spec | PoYo price | Official price | You save |
|---|---|---|---|---|
| claude-opus-4-5-20251101 | Input | $4.00/1M tokens 1000 credits /1M tokens | - | - |
Output | $20.00/1M tokens 5000 credits /1M tokens | - | - | |
| claude-sonnet-4-5-20250929 | Input | $2.40/1M tokens 1000 credits /1M tokens | - | - |
Output | $12.00/1M tokens 5000 credits /1M tokens | - | - | |
| claude-haiku-4-5-20251001 | Input | $0.800/1M tokens 1000 credits /1M tokens | - | - |
Output | $4.00/1M tokens 5000 credits /1M tokens | - | - |
* Actual fees are based on the final output.
Introduction
Complete guide to using Affordable Claude 4.5 Series API on PoYo
Affordable Claude 4.5 Series API on PoYo
Access the full Claude 4.5 Series API instantly on PoYo—no waitlist required. Choose from Claude Opus 4.5, Sonnet 4.5, and Haiku 4.5 with 200K context window, 64K max output, Extended Thinking, and industry-leading coding performance. Supports both /v1/chat/completions and /v1/messages endpoints for seamless integration.
Supported Claude 4.5 Models on PoYo
View Documentation
02
Claude Sonnet 4.5
claude-sonnet-4-5-20250929 — Best balance of speed and intelligence. 200K context, 64K output, Extended Thinking. Input: $2.4/1M tokens, Output: $12/1M tokens.
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Claude Haiku 4.5
claude-haiku-4-5-20251001 — Fastest and most cost-effective. 200K context, 64K output. Input: $0.8/1M tokens, Output: $4/1M tokens.
Key Features of Claude Opus 4.5 API
Anthropic's most capable model, designed for complex reasoning, production code, and autonomous agent workflows.
01
Extended Thinking & Deep Reasoning
Claude Opus 4.5 features Extended Thinking mode that enables step-by-step chain-of-thought reasoning for complex tasks. The model automatically preserves all thinking blocks across multi-turn conversations, maintaining reasoning continuity for long-running agentic workflows.
- Step-by-step chain-of-thought reasoning
- Preserved thinking context across turns
- Configurable effort parameter for cost/performance balance
02
Industry-Leading Code Generation (SWE-bench 80.9%)
Claude Opus 4.5 achieves 80.9% on SWE-bench Verified—the first model to cross 80%, making it the benchmark leader for real-world software engineering tasks. It excels at code migration, refactoring, and solving complex GitHub issues across entire codebases.
- First model to surpass 80% on SWE-bench Verified
- Outperforms human candidates on Anthropic's internal coding exam
- 50% reduction in token usage for coding tasks
03
200K Context Window & 64K Output
Process entire codebases, long documents, and complex multi-file projects with a 200K token context window. Generate comprehensive code files, detailed analysis reports, and long-form content with up to 64K output tokens per response.
- 200,000 token input context window
- 64,000 token maximum output
- Handle full repositories and multi-document analysis
04
Advanced Vision & Multimodal Understanding
Claude Opus 4.5 is Anthropic's best vision model. Process images alongside text to analyze charts, technical diagrams, reports, UI screenshots, and complex visual data. Ideal for workflows that require visual interpretation and multi-step navigation.
- Analyze charts, graphs, and technical diagrams
- Process UI screenshots and visual documents
- Multi-step visual reasoning workflows
05
Agentic Workflows & Advanced Tool Use
Build autonomous AI agents that can sustain long-horizon tasks with multi-step execution. Claude Opus 4.5 supports advanced tool use including dynamic tool discovery, programmatic tool calling, and computer use capabilities for browser and desktop automation.
- Self-improving agents that refine autonomously
- Dynamic tool discovery from large tool libraries
- Computer use for browser and desktop automation
06
Dual API Endpoint Support
PoYo supports both OpenAI-compatible and Anthropic-native API endpoints for Claude Opus 4.5. Use /v1/chat/completions for drop-in OpenAI SDK compatibility, or /v1/messages for native Anthropic API features. Switch between endpoints without changing your model or credentials.
- /v1/chat/completions — OpenAI-compatible endpoint
- /v1/messages — Anthropic-native endpoint
- Same API key works for both endpoints
Who Can Benefit from Claude Opus 4.5 API?
01
Software Development Teams
Accelerate code generation, review, migration, and refactoring with the industry's top coding model. Claude Opus 4.5 API handles complex multi-file changes, writes production-ready code, and resolves real-world GitHub issues at 80.9% accuracy via PoYo.
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AI Agent Developers
Build autonomous agents that execute long-horizon tasks with sustained reasoning. Claude Opus 4.5 API's advanced tool use, computer use, and self-improving capabilities make it ideal for complex agentic workflows through PoYo.
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Enterprise & Business Intelligence
Power sophisticated analysis across regulatory filings, market reports, and internal data. Claude Opus 4.5 API excels at predictive modeling, compliance analysis, and connecting insights across complex information systems on PoYo.
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Content & Document Analysis
Process long documents, legal contracts, research papers, and multi-file reports with the 200K context window. Claude Opus 4.5 API delivers detailed summaries, extractions, and cross-document analysis through PoYo.
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Research & Education
Leverage Extended Thinking for complex reasoning tasks in research, mathematics, and scientific analysis. Claude Opus 4.5 API provides step-by-step explanations and handles nuanced academic content on PoYo.
Claude Opus 4.5 vs Sonnet 4.5, Gemini 3.0 Pro, GPT-5.2 — Model Comparison
How does Claude Opus 4.5 compare to the latest frontier models? Opus 4.5 leads in SWE-bench coding accuracy and offers unique computer use capabilities, while competing models excel in context length and pricing.
| Feature | Claude Opus 4.5 | Claude Sonnet 4.5 | Gemini 3.0 Pro | GPT-5.2 |
|---|---|---|---|---|
| Provider | Anthropic | Anthropic | OpenAI | |
| Release Date | Nov 2025 | Sep 2025 | Nov 2025 | Dec 2025 |
| Context Window | 200K tokens | 200K (1M beta) | 1M tokens | 400K tokens |
| Max Output | 64K tokens | 64K tokens | 64K tokens | 128K tokens |
| SWE-bench Verified | 80.9% | 77.2% | N/A | 55.6% (Pro) |
| Extended Thinking | Yes | Yes (hybrid) | Deep Think | Thinking mode |
| Tool Use | Advanced (dynamic) | Advanced | Function Calling | Function Calling |
| Vision | Yes (best-in-class) | Yes | Yes (multimodal) | Yes |
| Computer Use | Yes | Yes | No | No |
| Input Price (Official) | $5 / 1M | $3 / 1M | $2 / 1M | $1.75 / 1M |
| Output Price (Official) | $25 / 1M | $15 / 1M | $12 / 1M | $14 / 1M |
| Best For | Complex coding & agents | Balanced speed & quality | Long context & multimodal | Reasoning & knowledge work |
Benchmark data sourced from official model documentation as of January 2026. SWE-bench Pro for GPT-5.2. Pricing reflects standard API rates.
How to Use Claude 4.5 Series API on PoYo
Step 1: Register & Create API Key
Sign up for a free PoYo account and generate your API key in under 2 minutes. No waitlist, no approval process required.
Create API Key →
Step 2: Top Up Credits
Add credits to your account. Claude 4.5 Series uses pay-per-use pricing — Opus: $4/$20, Sonnet: $2.4/$12, Haiku: $0.8/$4 per 1M input/output tokens. No subscription fees or monthly minimums.
Add Credits →
Step 3: Integrate the API
Use the OpenAI-compatible endpoint or the Anthropic-native endpoint. Choose your model: claude-opus-4-5-20251101, claude-sonnet-4-5-20250929, or claude-haiku-4-5-20251001. Here's a quick start example: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 professional AI assistant."},
{"role": "user", "content": "Tell me about the history of artificial intelligence."}
]
}'
View Documentation →
Claude 4.5 Series API Pricing: Simple and Affordable
| Model | Input | Output |
|---|---|---|
| Claude Opus 4.5 | $4 / 1M tokens | $20 / 1M tokens |
| Claude Sonnet 4.5 | $2.4 / 1M tokens | $12 / 1M tokens |
| Claude Haiku 4.5 | $0.8 / 1M tokens | $4 / 1M tokens |
All models include:
✓ 200K context window
✓ 64K max output tokens
✓ Extended Thinking support
✓ Vision & multimodal input
✓ Advanced tool use & computer use
✓ /v1/chat/completions and /v1/messages endpoints
No subscription fees — pay only for what you use. Enterprise volume discounts available for high-usage teams. Contact sales →
Frequently Asked Questions about Claude Opus 4.5 API
What is Claude Opus 4.5?
Claude Opus 4.5 (claude-opus-4-5-20251101) is Anthropic's most intelligent AI model, released in November 2025. It leads the industry in coding (80.9% SWE-bench), agentic workflows, computer use, and enterprise tasks. It features a 200K context window, 64K max output, Extended Thinking, and advanced vision capabilities.
How much does Claude 4.5 Series API cost on PoYo?
Claude 4.5 Series API on PoYo offers three models at different price points: Claude Opus 4.5 at $4/$20, Claude Sonnet 4.5 at $2.4/$12, and Claude Haiku 4.5 at $0.8/$4 per 1M input/output tokens. No subscription fees — pay only for actual usage. Enterprise volume discounts are available for high-usage teams.
Which API endpoints are supported?
PoYo supports two endpoints for Claude Opus 4.5: /v1/chat/completions (OpenAI-compatible, works with OpenAI SDKs) and /v1/messages (Anthropic-native, supports all Anthropic API features). Both endpoints use the same API key and model ID.
What is Extended Thinking?
Extended Thinking gives Claude Opus 4.5 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.
Is Claude Opus 4.5 API compatible with the OpenAI SDK?
Yes. PoYo's /v1/chat/completions endpoint is fully compatible with the OpenAI SDK. Simply change the base URL to your PoYo API endpoint and use your PoYo API key. Your existing OpenAI SDK code works with Claude Opus 4.5 with minimal changes.
Can I use Claude Opus 4.5 API with Claude Code?
Absolutely. PoYo's Claude Opus 4.5 API fully supports both /v1/chat/completions and /v1/messages endpoints, making it compatible with all major AI coding clients — including Cursor, Cline, and Claude Code. We will also be releasing dedicated guides to help you set up and use Claude Opus 4.5 via PoYo in these tools.
Why Use PoYo for Claude Opus 4.5 API Access
01
Instant Access
Start using Claude Opus 4.5 API in under 2 minutes. No waitlist, no approval process, no enterprise contracts required. Sign up, get your API key, and start building immediately on PoYo.
02
Affordable Pricing
Access the full Claude 4.5 Series starting from just $0.8/1M input tokens with Haiku, up to $4/1M with Opus. No subscription fees — pay only for what you use. Enterprise volume discounts available for high-usage teams.
03
Dual API Compatibility
Use /v1/chat/completions for OpenAI SDK compatibility or /v1/messages for native Anthropic features. Same API key, same model — two flexible integration paths on PoYo.
04
Production-Grade Reliability
99.9% uptime SLA with automatic failover and traffic spike handling. PoYo's infrastructure is built for enterprise applications requiring consistent Claude Opus 4.5 API performance.
05
Developer Friendly
Clean REST API with comprehensive documentation, interactive playground, and code examples in cURL, Python, and JavaScript. Production-ready integration in under 30 minutes on PoYo.