Claude Opus 4.8 API
$4.500(~ 306 credits) per 1M input tokens; $22.500(~ 1530 credits) per 1M output tokens
$5.625(~ 382.5 credits) per 1M cache write tokens; $0.450(~ 30.6 credits) per 1M cache read tokens
Web search tool charged separately per request.
Highest stability with guaranteed 99.9% uptime. Recommended for production environments.
Use the same API endpoint for all versions. Only the model parameter differs.
Claude Opus 4.8 API for Coding Agents
Route Anthropic's flagship model through EvoLink when Claude Code, coding agents, and long-context workflows need stronger planning, code reasoning, and production control.
Is Claude Opus 4.8 a good fit for Claude Code and coding agents?
Use it for cross-file planning and large code changes
When Claude Code or an internal coding agent needs to understand dependencies across files, plan a refactor, review long diffs, or produce a migration plan, Opus 4.8 is a stronger high-value coding route.
Use it for long agent runs and tool orchestration
When an agent needs to call tools across multiple steps, preserve task state, follow complex constraints, and reduce correction loops, Opus 4.8 works better as an escalation route than as the default for every agent request.
Use it for large codebases and long-context decisions
When your workflow needs to read large repos, long documents, logs, specs, and research notes in one reasoning path, Opus 4.8 is better suited to context-heavy production tasks.
When should you route to Claude Opus 4.8, and when should you avoid it?
This product page is not a review. It helps teams decide which production requests deserve the flagship route and which requests should stay on lighter Claude models.
Do not send simple requests to Opus 4.8 by default
Classification, short summaries, light Q&A, format conversion, and low-risk automation usually do not need the flagship model. Keep those requests on lighter Claude routes to control latency and cost.
How Opus 4.8 and Opus 4.7 should share traffic
If your current Opus 4.7 route is stable for everyday high-quality work, keep it in place. Use Opus 4.8 for harder codebase analysis, longer agent runs, migration planning, and requests where failure costs more.
Separate premium routes from everyday traffic
Keep Opus 4.8 for high-value coding, agent, and long-context paths while routing simpler requests to lower-cost Claude models when they are a better fit.
Claude Opus 4.8 and Opus 4.7: what is different?
Use this as a routing decision table, not a full benchmark. Keep proven Opus 4.7 paths where they work, and move higher-value requests to Opus 4.8 deliberately.
| Decision point | Keep Opus 4.7 when... | Route to Opus 4.8 when... |
|---|---|---|
| Existing workload | The route is stable and the quality already meets production needs. | The task needs stronger reasoning or fewer correction loops. |
| Claude Code | Edits are small, local, or well-scoped. | The task spans many files, long diffs, architecture decisions, or migration planning. |
| Agent workflow | The agent flow is short, predictable, and low risk. | The agent runs longer tool loops, carries more state, or has a higher failure cost. |
| Long context | The context is moderate and current prompts work reliably. | The request depends on large repos, logs, specs, or research packs. |
| Routing strategy | You want to preserve a proven production baseline. | You want to upgrade only high-value paths without moving all Claude traffic at once. |
How do you call the Claude Opus 4.8 API through EvoLink?
Create your EvoLink key, use `claude-opus-4-8` as the model ID, and move from evaluation to production with caching, parameters, and deliberate model selection.
Step 1 - Create one unified API key
Sign up for EvoLink and use one API key to manage Claude model access instead of maintaining separate integration logic for each provider.
Step 2 - Use claude-opus-4-8
Set the model parameter to `claude-opus-4-8` so this request enters the Opus 4.8 route explicitly instead of being mixed into generic Claude traffic.
Step 3 - Choose a routing strategy by workflow
Decide when to use Opus 4.8 and when to switch back to Sonnet or Haiku based on task value, context size, latency requirements, and cache behavior.
How should long context, fast mode, and caching work together?
The real production question is not a single parameter. It is how long context, response speed, and repeated-request cost shape your routing policy.
Use 1M context for high-value long tasks
You can process large documents, research packs, or codebases in one request, but long context does not mean every request should carry the maximum possible context.
Use 128K output for complete plans and long code
Longer output helps with code, plans, reports, and structured deliverables, but production prompts should still set clear output boundaries to avoid waste.
Use fast mode on latency-sensitive paths
Fast mode is better for interactive coding, agent loops, and production paths where response speed changes the user experience. It should not be the default for every batch or background task.
Use vision input for screenshots and document review
Combine text and image inputs for screenshot analysis, document review, UI inspection, and multimodal debugging workflows.
Prompt caching for repeated context
Use cache writes and cache hits for stable prompts and recurring long inputs instead of sending the same context as a fresh request every time.
Keep routing explicit for future migration
Keep `claude-opus-4-8` explicit so teams can compare Opus, Sonnet, and Haiku routes across quality, latency, and cost.
Switch Claude routes inside the same API
EvoLink gives you access to Claude models through one API. Use Opus 4.8 for high-value paths, then route everyday high-frequency requests to Sonnet or Haiku when they fit better. All models share the same EvoLink API endpoint, so you can switch models with one parameter.
Claude Opus 4.8 API access FAQ
Everything you need to know about the product and billing.