Claude API Family
Use one EvoLink API to access every Claude model. Compare Opus, Sonnet, and Haiku on pricing, context, coding benchmarks, and capabilities — then pick the right model for your workload.
8 models
Opus, Sonnet, and Haiku tiers
Unified API access
OpenAI compatible, fast onboarding
Choose by workflow
Match model to task before integrating
Compare the Claude models
Choose based on your primary constraint: quality, cost, context length, or output size.
| Model | Best for | Input / MTok | Output / MTok | Context | Max output | SWE-bench |
|---|---|---|---|---|---|---|
Claude Opus 4.7 Current Flagship | Complex coding, agent orchestration, extended thinking, and research synthesis. | $5.00 | $25.00 | 1M | 128K | — |
Claude Opus 4.6 Previous Opus | Previous-generation Opus route for teams migrating premium coding and agent workloads to Opus 4.7. | $5.00 | $25.00 | 1M | 128K | 80.8% |
Claude Sonnet 4.6 Best Balance | Everyday coding, agentic workflows, and extended thinking at balanced cost. | $3.00 | $15.00 | 1M | 128K | — |
Claude Haiku 4.5 Fastest | High-volume agents, sub-agents, latency-sensitive chat, and free-tier products. | $1.00 | $5.00 | 200K | — | 73.3% |
Claude Sonnet 4.5 Previous Sonnet | Previous-generation Sonnet route for existing coding and agent workflows. | $3.00 | $15.00 | 200K (1M beta) | — | — |
Claude Opus 4.5 Stable | Previous-gen flagship with pinned versioned ID for stable production. | $5.00 | $25.00 | 200K | 64K | — |
Claude Opus 4.1 Agentic | Multi-file refactoring, agentic coding, and deep research analysis. | $15.00 | $75.00 | 200K | — | 74.5% |
Claude Sonnet 4.0 1M Beta | Production workloads with 1M context beta for large documents. | $3.00 | $15.00 | 200K (1M beta) | — | — |
How to decide which Claude model to use
Follow these 4 rules to narrow down your choice.
Start with task complexity
Complex reasoning, agentic coding, extended thinking, multi-step analysis — start with Opus.
Then check cost sensitivity
If you need strong results at lower cost, Sonnet delivers 80%+ of Opus quality at 40% less. Haiku is 5x cheaper for simple tasks.
Then check context and output needs
Opus 4.7, Opus 4.6, and Sonnet 4.6 support 1M context. Older Claude routes remain at 200K, with Sonnet 4.5 offering 1M beta.
Finally, consider routing
If tasks vary in complexity within the same workflow, consider EvoLink Smart Router instead of hardcoding one model.
Smart Router →If you already know your task type, find the recommended starting point in the table below.
Choose a Claude model by workflow: coding, reasoning, support, and agents
Match your primary task to the right Claude model.
| Your task | Recommended start | Good fit if... | Watch out for |
|---|---|---|---|
| Coding agents | Claude Sonnet | You need balanced coding, reasoning, and cost for agentic workflows | Start with Sonnet 4.6 for new agentic coding workflows; keep Sonnet 4.5 for existing routes that depend on it |
| Deep reasoning and analysis | Claude Opus | Tasks require extended thinking, multi-step reasoning, or highest quality output | Higher cost — reserve for high-value tasks |
| High-volume assistants and sub-agents | Claude Haiku | Tasks are simple, call volume is high, latency matters | Not suited for complex reasoning |
| Long-context document analysis | Claude Sonnet 4.5 | You need 1M context beta for large documents or codebases | 1M context is in beta |
| Mixed text workflows | EvoLink Smart Router | Same workflow has both simple and complex tasks | Best when you don't want to maintain manual routing logic |
Claude API workflows
Choose the right Claude model for real production workflows.
Coding agents
Use Sonnet or Opus for code generation, review, and debugging in agentic coding workflows.
Long-context document analysis
Process large documents, contracts, and research papers with up to 1M context on the latest Opus and Sonnet routes, while older Claude routes remain at 200K.
Customer support assistants
Use Haiku for high-volume, low-latency support agents. Upgrade to Sonnet for complex reasoning when needed.
Agent routing and mixed text tasks
For supported text and agent workflows, EvoLink Smart Router can help route tasks through evolink/auto when you do not want to hardcode a single model.
View Claude model details
Pick a model, then visit its detail page for full capabilities, pricing, and integration.
Claude Opus 4.7
Current Flagship
- Context
- 1M
- Pricing
- $5.00 / $25.00
Claude Opus 4.6
Previous Opus
- Context
- 1M
- Pricing
- $5.00 / $25.00
Claude Sonnet 4.6
Best Balance
- Context
- 1M
- Pricing
- $3.00 / $15.00
Claude Haiku 4.5
Fastest
- Context
- 200K
- Pricing
- $1.00 / $5.00
Claude Sonnet 4.5
Previous Sonnet
- Context
- 200K (1M beta)
- Pricing
- $3.00 / $15.00
Claude Opus 4.5
Stable
- Context
- 200K
- Pricing
- $5.00 / $25.00
Claude Opus 4.1
Agentic
- Context
- 200K
- Pricing
- $15.00 / $75.00
Claude Sonnet 4.0
1M Beta
- Context
- 200K (1M beta)
- Pricing
- $3.00 / $15.00
Access Claude models through one EvoLink API
All Claude models are available through a single EvoLink API key and OpenAI-compatible endpoint. Switch between Opus, Sonnet, and Haiku by changing the model parameter — no separate accounts or keys needed.
How to think about Claude API cost: reasoning depth, volume, and context
Deep reasoning amplifies output cost
Extended thinking, complex agents, and multi-step analysis produce longer outputs. If task value is high, Opus quality may matter more than cost. For simpler tasks, Sonnet or Haiku will be more cost-efficient.
High volume favors Haiku
Support bots, sub-agents, and free-tier products with high call volume should start with Haiku at $1/$5 per MTok — 5x cheaper than Opus, 3x cheaper than Sonnet.
Context length affects input cost
All Claude models support 200K context. Sonnet 4.5 has 1M beta. If your main bottleneck is input volume rather than reasoning depth, consider whether Sonnet is sufficient before defaulting to Opus.
Pricing summary
All Claude models use per-token pricing. Prompt caching (0.1x cache reads) and batch processing (50% off) are available across all tiers. EvoLink offers discounted access — see each model page for current EvoLink rates.
Opus tier
$5.00 input
$25.00 output
Context: 200K–1M
Flagship tier — use for complex reasoning, coding, and agent tasks where quality is the priority.
Sonnet tier
$3.00 input
$15.00 output
Context: 200K–1M
Balanced tier — recommended default for most production workloads at 40% less than Opus.
Haiku tier
$1.00 input
$5.00 output
Context: 200K
Speed tier — 5x cheaper than Opus, ideal for high-volume and latency-sensitive applications.
Related Claude guides
Use this page to compare models, then visit guides for pricing details, comparisons, and integration.
Claude API Pricing Guide 2026
Complete pricing breakdown for every Claude model — base rates, caching, batch discounts, and cost optimization tips.
Claude Opus 4.7 vs Claude Opus 4.6
Upgrade and migration comparison covering pricing, model IDs, token behavior, and routing choices.
GPT-5.4 vs Claude Opus 4.6 vs Gemini 3.1 Pro
Three-way flagship comparison with pricing tables, SWE-bench scores, and decision framework.
Fix Claude 429 Rate Limit Errors
Troubleshooting guide for Claude 429 errors — why they happen and how to fix them with EvoLink routing.
Best LLM for Coding Agents
Compare Claude, GPT, DeepSeek, Qwen Coder, and Gemini for coding agent workloads — API cost, tool-call reliability, and fallback planning.
Claude API Family FAQ
Everything you need to know about the product and billing.