Provider profile: Anthropic — Anthropic builds safety-focused AI systems. The Claude model family leads on coding, agentic workflows, and long-context reasoning, with a 1M-token context window and industry-leading computer use capabilities.
← All providers
Anthropic
US9 modelsClaude — frontier intelligence for coding, agents, and enterprise
Anthropic builds safety-focused AI systems. The Claude model family leads on coding, agentic workflows, and long-context reasoning, with a 1M-token context window and industry-leading computer use capabilities.
- ✓Claude series — frontier intelligence for coding, agents, and enterprise
- ✓1M token context window across the latest Claude models
- ✓Industry-leading computer use and agentic workflow capabilities
- ✓Extended thinking / reasoning mode for complex multi-step problems
ReasoningCodingVisionTool useComputer use
Quickstart
from openai import OpenAI
client = OpenAI(
base_url="https://api.therouter.ai/v1",
api_key="YOUR_THEROUTER_KEY",
)
response = client.chat.completions.create(
model="anthropic/claude-sonnet-4.6",
messages=[{"role": "user", "content": "Write a Python function to parse JSON"}],
max_tokens=512,
)
print(response.choices[0].message.content)Models
Claude Haiku 3.5Claude 3.5 Haiku features offers enhanced capabilities in speed, coding accuracy, and tool use. Engineered to excel in real-time applications, it delivers quick response times that are essential for dynamic tasks such as chat interactions and immediate coding suggestions. This makes it highly suitable for environments that demand both speed and precision, such as software development, customer service bots, and data management systems.Claude Haiku 4.5Claude Haiku 4.5 delivers near-frontier performance for a wide range of use cases, and stands out as one of the best coding and agent models–with the right speed and cost to power free products and high-volume user experiences. Use cases: Powering free tier user experiences: Claude Haiku 4.5 delivers near-frontier performance at a cost and speed that makes powering free agent products and agentic use cases economically viable at scale. Real-time experiences: Claude Haiku 4.5's speed is ideal for real-time applications like customer service agents and chatbots where response time is critical. Coding sub-agents: Use Claude Haiku 4.5 to power sub-agents, enabling multi-agent systems that tackle complex refactors, migrations, and large feature builds with quality and speed. Financial sub-agents: Use Claude Haiku 4.5 to monitor thousands of data streams—tracking regulatory changes, market signals, and portfolio risks to preemptively adapt compliance and trading systems at previously impossible scales. Research sub-agents: Perform parallel analyses across multiple data sources while maintaining fast response times. Ideal for rapid business intelligence, competitive analysis, and real-time decision support. Business tasks: Claude Haiku 4.5 is capable of producing and editing office files like slides, documents, and spreadsheets. It also better supports strategy and campaign planning, business analysis and brainstorming.Claude Opus 4Claude Opus 4 is Anthropic's most intelligent model and is state-of-the-art for coding and agent capabilities, especially agentic search. It excels for customers needing frontier intelligence: Advanced coding: Independently plan and execute complex development tasks end-to-end. It adapts to your style and maintains high code quality throughout. AI agents: Enable agents to tackle complex, multi-step tasks that require peak accuracy. Agentic search and research: Connect to multiple data sources to synthesize comprehensive insights across repositories. Long-horizon tasks and complex problem solving (virtual collaborator): Unlock new use cases involving long-horizon tasks that require memory, sustained reasoning, and long chains of actions. Content creation: Create human-quality content with natural prose. Produce long-form creative content, technical documentation, marketing copy, and frontend design mockups.Claude Opus 4.1Claude Opus 4.1 is Anthropic's most intelligent model and an industry leader for coding and agent capabilities, especially agentic search. It excels for customers needing frontier intelligence: Advanced coding: Independently plan and execute complex development tasks end-to-end. It adapts to your style, thoughtfully plans and pivots, and maintains high code quality throughout. Long-horizon tasks and complex problem solving (virtual collaborator): Unlock new use cases involving long-horizon tasks that require memory, sustained reasoning, and long chains of actions. AI agents: Enable agents to tackle complex, multi-step tasks that require peak accuracy. Agentic search and research: Connect to multiple data sources to synthesize comprehensive insights across repositories. Content creation: Create human-quality content with natural prose. Produce long-form creative content, technical documentation, marketing copy, and frontend design mockups. Memory and context management: Incorporates memory capabilities that allow it to effectively summarize and reference previous interactions.Claude Opus 4.5The next generation of Anthropic's most intelligent model, Claude Opus 4.5 is an industry leader across coding, agents, computer use, and enterprise workflows. Use cases: Coding: Opus 4.5 can confidently deliver multi-day software development projects in hours, working independently with the technical depth and taste to create efficient and straightforward solutions. It has improved performance across coding languages, with better planning and architecture choices - making it the ideal model for enterprise developers. Agents: Claude Opus 4.5, paired with our advanced tool use capabilities, enables more capable agents with new behaviors. Computer use: Our best computer-using model yet, Claude Opus 4.5 navigates new experiences with confident, consistent approaches that deliver more human-like browsing, enabling better web QA, workflow automation, and advanced user experiences. Enterprise workflows: Opus 4.5 can power agents that manage sprawling professional projects from start to finish. It better leverages memory to maintain context and consistency across files, alongside a step-change improvement in creating spreadsheets, slides, and docs. Financial analysis: Opus 4.5 connects the dots across complex information systems - regulatory filings, market reports, internal data - making sophisticated predictive modeling and proactive compliance possible. Cybersecurity: Opus 4.5 brings professional-grade analysis to security workflows, correlating logs, vulnerability databases, and threat intelligence for proactive threat detection and automated incident response.Claude Opus 4.6Claude Opus 4.6 is the next generation of our most intelligent model, and the world's best model for coding, enterprise agents, and professional work. Use cases include: Agents: Opus 4.6 is the world's best model for agentic workflows, orchestrating complex tasks across dozens of tools with industry-leading reliability. It proactively spins up subagents, parallelizes work, and drives tasks forward with minimal oversight. Coding: Opus 4.6 is the world's best coding model, excelling at long-horizon projects, complex implementations, and large-scale codebases. It handles the full lifecycle from architecture to deployment—so senior engineers can delegate their most complex work with confidence. Enterprise workflows: Opus 4.6 sets the standard for enterprise workflows, powering agents that manage sprawling projects end-to-end with professional polish, domain awareness, and industry-leading performance on spreadsheets, slides, and docs. Financial analysis: Opus 4.6 is Anthropic's most capable model for financial workflows, surfacing insights that would take analysts days to compile. It handles the nuance and precision that compliance-sensitive work demands. Cybersecurity: Opus 4.6 delivers the deepest reasoning for security workflows, catching subtle patterns and complex attack vectors with unmatched accuracy. Computer use: Opus 4.6 is our most capable computer-use model for complex workflows, bringing deep reasoning to multi-step tasks that span multiple applications and require planning and judgment.Claude Sonnet 4Claude Sonnet 4 balances impressive performance for coding with the right speed and cost for high-volume use cases: Coding: Handle everyday development tasks with enhanced performance-power code reviews, bug fixes, API integrations, and feature development with immediate feedback loops. AI Assistants: Power production-ready assistants for real-time applications—from customer support automation to operational workflows that require both intelligence and speed. Efficient research: Perform focused analysis across multiple data sources while maintaining fast response times. Ideal for rapid business intelligence, competitive analysis, and real-time decision support. Large-scale content: Generate and analyze content at scale with improved quality. Create customer communications, analyze user feedback, and produce marketing materials with the right balance of quality and throughput.Claude Sonnet 4.5Claude Sonnet 4.5 is our most capable model to date for building real-world agents and handling complex, long-horizon tasks–balancing the right speed and cost for high-volume use cases: Long-running agents: Power production-ready assistants for multi-step, real-time applications—from customer support automation to complex operational workflows that require peak accuracy, intelligence, and speed. Coding: Handle everyday development tasks with enhanced performance––or plan and execute complex software projects spanning hours or days––with the ability to save, maintain, and reference information across multiple sessions. Cybersecurity: Deploy agents that autonomously patch vulnerabilities before exploitation––shifting from reactive detection to proactive defense. Financial analysis: Conduct entry-level financial analysis, deliver advanced predictive analysis, or preemptively develop intelligent risk management strategies that leverage best-in-class domain knowledge. Computer use: Claude Sonnet 4.5 is our most accurate model for computer use, enabling developers to direct Claude to use computers the way people do. Research: Perform focused analysis across multiple data sources, turning expert analysis into final deliverables. Ideal for complex problem solving, rapid business intelligence, and real-time decision support.
Frequently Asked Questions
Which Claude models are available on TheRouter?
TheRouter provides the full Claude lineup: Opus 4.6 (most intelligent), Sonnet 4.6 (best for coding and agents), Haiku 4.5 (fastest and most cost-efficient), and several previous generation models. All use the standard anthropic/model-name format.
Does TheRouter support Claude's extended thinking / reasoning mode?
Yes. Pass the reasoning parameter in your API call and Claude's chain-of-thought tokens will be returned in the response. TheRouter passes these parameters through to Anthropic's API without modification.
How does TheRouter route to Anthropic?
TheRouter routes Claude requests through a dedicated Anthropic provider service that calls the Anthropic Messages API directly. No aggregators, no pools — every request is a direct API connection.
What happens if Anthropic's API is unavailable?
TheRouter's health-aware routing detects provider failures and can automatically fall back to equivalent models on other providers (like Bedrock Claude models), based on your routing configuration.