Best overall
Strong reasoning, tooling and production reliability.
Model · Anthropic
Claude Opus 5
Claude Opus 5 is served by Anthropic through OpenRouter. It provides 1M tokens of context and supports text, vision, files inputs.
Context window
1M tokens
Input / 1M tokens
$5.00
Output / 1M tokens
$25.00
Key facts
| Provider | Anthropic |
| OpenRouter ID | anthropic/claude-opus-5 |
| Modalities | Text, Vision, Files |
| Best for | Overall, Agents, Coding |
Source
openrouter.ai/api/v1/models Verified 2026-10-16 Drift-checked daily 06:00 CST Best-fit workloads
Best for coding
Good code quality, debugging and technical explanation.
Best for agents
Tool use, structured output and multi-step reasoning.
Cost estimates
These examples use the 2026-10-16 input and output prices. Cache discounts, provider surcharges and tool fees are excluded.
| Workload | Input | Output | Estimated cost |
|---|---|---|---|
| Quick test | 20,000 | 5,000 | $0.225 |
| Product chat month | 500,000 | 125,000 | $5.63 |
| Document batch | 5,000,000 | 1,000,000 | $50.00 |
Strengths
- ✓ Highest reasoning quality in the snapshot
- ✓ Best fit for difficult analysis and complex agent chains
- ✓ Large context window with strong instruction following
Limitations
- ! Most expensive option in the snapshot
- ! Overkill for simple extraction or classification
OpenRouter API quickstart
Run these examples from your server or edge function. Keep the OpenRouter API key private and do not expose it in browser code.
cURL
curl https://openrouter.ai/api/v1/chat/completions \
-H "Authorization: Bearer $OPENROUTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "anthropic/claude-opus-5",
"messages": [{ "role": "user", "content": "Summarize this document in five bullet points." }],
"max_tokens": 500
}'JavaScript / TypeScript
const response = await fetch("https://openrouter.ai/api/v1/chat/completions", {
method: "POST",
headers: {
Authorization: `Bearer ${process.env.OPENROUTER_API_KEY}`,
"Content-Type": "application/json",
},
body: JSON.stringify({
model: "anthropic/claude-opus-5",
messages: [{ role: "user", content: "Summarize this document in five bullet points." }],
max_tokens: 500,
}),
});
const data = await response.json();
console.log(data.choices[0].message.content);How to evaluate Claude Opus 5
- Run five real tasks from your product, not generic demo prompts.
- Record token usage, latency and output quality.
- Estimate cost using your real input/output mix.
- Compare it against one model with a similar price and one stronger model.
Compare models View on OpenRouter ↗
Claude Opus 5 FAQ
What is Claude Opus 5?
Claude Opus 5 is a Anthropic model available through OpenRouter. It supports text, vision, files inputs and is suited for overall, agents, coding workloads.
How much does Claude Opus 5 cost on OpenRouter?
The 2026-10-16 snapshot lists $5.00 per 1M input tokens and $25.00 per 1M output tokens. Verify current pricing on OpenRouter before production.
How large is Claude Opus 5's context window?
Claude Opus 5 offers 1M tokens of context in the current snapshot. Provider-specific limits and surcharges may apply.
Head-to-head comparisons
Claude Opus 5 vs OpenAI GPT-5.6 Terra
Claude Opus 5 is a strong choice for difficult reasoning, complex agent chains and high-stakes code. GPT-5.6 Terra is better when your workload leans heavily on multimodal input and long, file-heavy tasks.
DeepSeek V4 Pro vs Claude Opus 5
DeepSeek V4 Pro is attractive for cost-sensitive long-document reasoning. Claude Opus 5 is better when the task is hard enough to justify premium reasoning and agent behavior.
Pricing and context data are based on a 2026-10-16 snapshot. Provider limits can change; always verify on OpenRouter before production.