Question 1

What is Claude Opus 5 5?

Accepted Answer

Claude Opus 5 5 is a model from Anthropic, released on Sep 22, 2026. Claude Opus 5 5 is Anthropic's most capable Claude tier for complex coding, agentic workflows, and long-horizon reasoning across large codebases and documents. Claude Opus 5 5 is Anthropic's most capable Claude tier for complex coding, agentic workflows, and long-horizon reasoning across large codebases and documents. Supports tool use. Up to 1M context window.

Question 2

How much does Claude Opus 5 5 cost?

Accepted Answer

On the Respan gateway, input starts at $3.20 per 1M tokens on Anthropic, and output starts at $16.00 per 1M tokens on Anthropic, after gateway discounts. Averaged across 5 providers, it costs $3.84 per 1M input tokens and $19.20 per 1M output tokens.

Question 3

Which providers serve Claude Opus 5 5 on Respan?

Accepted Answer

5 providers serve Claude Opus 5 5: Anthropic, DeepInfra, OpenRouter, Perplexity, and Google Vertex AI. Perplexity and Google Vertex AI require your own provider API key (BYOK).

Question 4

What is Claude Opus 5 5's context window?

Accepted Answer

Claude Opus 5 5 accepts up to 1M tokens of context on its largest provider route.

Question 5

How do I use Claude Opus 5 5 with the Respan gateway?

Accepted Answer

Point any OpenAI-compatible SDK at https://api.respan.ai/api/ with your Respan API key and set the model to "anthropic/claude-opus-5-5". To set it up with a coding agent, copy the agent setup prompt at the top of this page.

Question 6

How fast is Claude Opus 5 5?

Accepted Answer

Over the last 30 days of requests through the Respan gateway, the fastest provider was Anthropic at 445 tokens per second, and the lowest response latency was 13.8 seconds on Anthropic. Speed varies with request size and provider.

Question 7

Where does Claude Opus 5 5 rank on the Respan Index?

Accepted Answer

Claude Opus 5 5 scores 72.4 out of 100 on the Respan Index v1.1, ranking #1 of 138 models. By category: Coding 72.8, Agents 76.9, Reasoning 75.5, Knowledge & language 70.5, and Human preference 60.6. The Respan Index combines independent and lab-reported benchmark results into one score, using benchmark data collected by llmmetric.com.

Question 8

How does Claude Opus 5 5 score on benchmarks?

Accepted Answer

Claude Opus 5 5 has 34 published benchmark scores, including LiveBench Coding 89.3%, OSWorld 2.0 (partial) 81.8%, and LiveBench Reasoning 92.2%. Each score links to where it was published; the data is collected by llmmetric.com.

Provider	Context	Input	Output
AnthropicSave 20%`anthropic/claude-opus-5-5`	1M	$3.20/M	$16.00/M
DeepInfra`deepinfra/anthropic/claude-opus-5-5`	1M	$4.00/M	$20.00/M
OpenRouter`openrouter/anthropic/claude-opus-5.5`	1M	$4.00/M	$20.00/M
PerplexityBYOK only`perplexity/anthropic/claude-opus-5-5`	1M	$4.00/M	$20.00/M
Google Vertex AIBYOK only`vertex_ai/claude-opus-5-5@default`	1M	$4.00/M	$20.00/M

Claude Opus 5 5

Providers

Certified where it counts.

Pricing

Cost by volume

Throughput and latency

Output speed

Time to first token

Response latency

Benchmarks

Respan Indexv1.1

Coding8

Apps

Claude Opus 5 5 FAQ

Works with your entire stack

Built for AI agents.
Break less.
Ship more.

Agents6

Reasoning7

Math4

Knowledge3

Multimodal2

Arena3

Other1