Last refreshed 2026-05-28. Next refresh: weekly.
Why use Claude Opus 4.8 on OpenRouter?
OpenRouter offers Claude Opus 4.8 with pay-as-you-go pricing at $5.00/1M input tokens. OpenRouter is a multi-provider LLM aggregator offering unified API access to 300+ models from all major labs and emerging providers, with automatic failover for reliability.
Compare Claude Opus 4.8 across 7 providers to find the best fit for your use caseSetup recipe
Docs fallbackUse the provider REST API or SDKCreate a provider API keymodel: anthropic/claude-opus-4.8anthropic/claude-opus-4.8Request example
anthropic/claude-opus-4.8.Gotchas
- Use provider model ID "anthropic/claude-opus-4.8", not the LLMReference slug "claude-opus-4-8".
Compare Claude Opus 4.8 Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| Anthropic | $5.00 | $25.00 |
| AWS Bedrock | $5.00 | $25.00 |
| GCP Vertex AI | $5.00 | $25.00 |
| Microsoft Foundry | $5.00 | $25.00 |
| OpenRouter | $5.00 | $25.00 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $5.00 |
| Output tokens | $25.00 |
Capabilities
About Claude Opus 4.8
Claude Opus 4.8 is Anthropic's most capable generally-available model for complex reasoning, long-horizon agentic coding, and high-autonomy work. It improves on Opus 4.7 across agentic coding (SWE-bench Pro 69.2% vs 64.3%), agentic terminal coding (Terminal-Bench 2.1 74.6% vs 66.1%), multidisciplinary reasoning (HLE 57.9% with tools vs 54.7%), and agentic computer use (OSWorld-Verified 83.4%). Features a 1M-token context window (200k on Microsoft Foundry), 128k max output tokens, adaptive thinking with effort control defaulting to high, computer use, and a fast mode at 2.5× speed ($10/$50 per MTok). Approximately 4× less likely than Opus 4.7 to leave undetected code flaws. Deprecated Claude Opus 4 and Claude Sonnet 4 should migrate to Claude Opus 4.8.
FAQ
What does Claude Opus 4.8 cost on OpenRouter?
On OpenRouter, Claude Opus 4.8 costs $5 per 1M input tokens and $25 per 1M output tokens.
What is the context window for Claude Opus 4.8 on OpenRouter?
Claude Opus 4.8 supports a 1m token context window on OpenRouter.
How does OpenRouter compare to other Claude Opus 4.8 providers?
Claude Opus 4.8 is available from 7 providers. The cheapest input pricing is $5.00/1M tokens from Anthropic.
What API model ID do I use for Claude Opus 4.8 on OpenRouter?
Use the model ID anthropic/claude-opus-4.8 when calling OpenRouter's API.
Who created Claude Opus 4.8?
Claude Opus 4.8 was created by Anthropic as part of the Claude 4.8 model family.
Is Claude Opus 4.8 open source?
Claude Opus 4.8 is not open source; the seed data lists it as proprietary.