Question 1

What is Claude Opus 4.8?

Accepted Answer

Claude Opus 4.8 is a model from Anthropic, released on May 28, 2026. Claude Opus 4.8 is Anthropic's most capable generally available model in the Opus family. It supports text, image, and file inputs with text output, with reasoning support and a 1M-token context window. It is suited for highly autonomous agents, long-horizon agentic work, knowledge work, and memory-driven tasks where coherence over extended sessions matters. It is particularly strong on multi-step reasoning, complex coding, and end-to-end project orchestration - large codebases, multi-stage debugging, and long-running asynchronous agent pipelines. Beyond coding, it handles knowledge work such as drafting documents, building presentations, and analyzing data, maintaining quality across very long outputs.

Question 2

How much does Claude Opus 4.8 cost?

Accepted Answer

On the Respan gateway, input starts at $5.00 per 1M tokens on every provider, and output starts at $25.00 per 1M tokens on every provider, after gateway discounts.

Question 3

Which providers serve Claude Opus 4.8 on Respan?

Accepted Answer

6 providers serve Claude Opus 4.8: Anthropic, DeepInfra, OpenRouter, Perplexity, Tera, and Google Vertex AI. Perplexity, Tera, and Google Vertex AI require your own provider API key (BYOK).

Question 4

What is Claude Opus 4.8's context window?

Accepted Answer

Claude Opus 4.8 accepts up to 1M tokens of context on its largest provider route.

Question 5

How do I use Claude Opus 4.8 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-4-8". 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 4.8?

Accepted Answer

Over the last 30 days of requests through the Respan gateway, the fastest provider was Anthropic at 57 tokens per second, and the lowest response latency was 1.2 seconds on OpenRouter. Speed varies with request size and provider.

Question 7

Where does Claude Opus 4.8 rank on the Respan Index?

Accepted Answer

Claude Opus 4.8 scores 52.2 out of 100 on the Respan Index v1.1, ranking #16 of 138 models. By category: Coding 35.3, Agents 64.2, Reasoning 55.6, Knowledge & language 52.6, and Human preference 54.2. 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 4.8 score on benchmarks?

Accepted Answer

Claude Opus 4.8 has 44 published benchmark scores, including SWE-bench Verified 88.6%, BrowseComp 84.3%, and GPQA Diamond 93.6%. Each score links to where it was published; the data is collected by llmmetric.com.

Provider	Context	Input	Output
Anthropic`anthropic/claude-opus-4-8`	1M	$5.00/M	$25.00/M
DeepInfra`deepinfra/anthropic/claude-opus-4-8`	1M	$5.00/M	$25.00/M
OpenRouter`openrouter/anthropic/claude-opus-4.8`	1M	$5.00/M	$25.00/M
PerplexityBYOK only`perplexity/anthropic/claude-opus-4-8`	1M	$5.00/M	$25.00/M
TeraBYOK only`tera/anthropic/claude-opus-4-8`	200K	$5.00/M	$25.00/M
Google Vertex AIBYOK only`vertex_ai/claude-opus-4-8@default`	200K	$5.00/M	$25.00/M

Claude Opus 4.8

Providers

Certified where it counts.

Pricing

Cost by volume

Throughput and latency

Output speed

Time to first token

Response latency

Benchmarks

Respan Indexv1.1

Coding10

Apps

Claude Opus 4.8 FAQ

Works with your entire stack

Built for AI agents.
Break less.
Ship more.

Agents7

Reasoning10

Math7

Knowledge4

Multimodal1

Arena4

Other1