# Claude Opus (latest)

> Always resolves to the newest live Claude Opus model — currently Claude Opus 5.5 (anthropic/claude-opus-5-5). Anthropic's Claude Opus 5.5 is the successor to Claude Opus 5 for long-running agentic coding and knowledge work. It delivers Fable 5.1-level performance at 40% lower cost ($4 / $20 per million input / output tokens), with adaptive thinking always on, 1M-token context, vision input, and tool use. Built for multi-step changes in large codebases, code review and bug finding, financial and scientific analysis, and reading dense charts and diagrams.

**ID**: `anthropic/claude-opus-latest`  
**Creator**: Anthropic  
**Category**: text  
**Context**: 1M tokens  
**Family alias**: always resolves to the newest live family member — currently [`anthropic/claude-opus-5-5`](https://anyrouter.dev/model/anthropic/claude-opus-5-5). Specs below are anthropic/claude-opus-5-5's.  
**Fallback order**: `anthropic/claude-opus-5-5` → `anthropic/claude-opus-5` → `anthropic/claude-opus-4-8` → `anthropic/claude-opus-4-7` → `anthropic/claude-opus-4-6` → `anthropic/claude-opus-4-5` → `anthropic/claude-opus-4-1` → `anthropic/claude-opus-4`  
**Pricing**: $4.00 / $20.00 per 1M · billed by your provider (BYOK)  
**Released**: 2026-09-22  
**Web page**: https://anyrouter.dev/model/anthropic/claude-opus-latest

**Input modalities**: text, image, file  
**Output modalities**: text  

**Capabilities**: chat, streaming, function-calling, coding, vision, reasoning

**Aliases**: `claude-opus-5-5`, `claude-opus-5.5`, `anthropic/claude-opus-5-5`, `anthropic/claude-opus-5.5`, `claude-opus-5-5-20260921`, `anthropic/claude-opus-5.5-20260921`

## Usage

**Endpoint**: `POST https://anyrouter.dev/api/v1/chat/completions`

```bash
curl https://anyrouter.dev/api/v1/chat/completions \
  -H "Authorization: Bearer $ANYROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "anthropic/claude-opus-latest",
  "messages": [
    {
      "role": "user",
      "content": "Say hi in 3 words."
    }
  ]
}'
```

## Providers

| Provider | Input | Output |
| --- | --- | --- |
| anthropic-byok | $4.00/M (list) | $20.00/M (list) |
| anthropic-bedrock-byok | $4.00/M (list) | $20.00/M (list) |
| anthropic-vertex-byok | $4.00/M (list) | $20.00/M (list) |
| anthropic-foundry-byok | $4.00/M (list) | $20.00/M (list) |
| openrouter-byok | $4.00/M (list) | $20.00/M (list) |
| opencode-zen-byok | $4.00/M (list) | $20.00/M (list) |
| cline-byok | $4.00/M (list) | $20.00/M (list) |
| router-byok | $4.00/M (list) | $20.00/M (list) |
| vercel-byok | $4.00/M (list) | $20.00/M (list) |
| deepinfra-byok | $4.00/M (list) | $20.00/M (list) |
| venice-byok | $4.00/M (list) | $20.00/M (list) |
| nousresearch-byok | $4.00/M (list) | $20.00/M (list) |
| onetoken-byok | $0.22/M (list) | $1.10/M (list) |
| beatapi-byok | $2.00/M (list) | $10.00/M (list) |
| tokenharbor-byok | $4.00/M (list) | $20.00/M (list) |
| inference-net-byok | $4.00/M (list) | $20.00/M (list) |
| zenmux-byok | $4.00/M (list) | $20.00/M (list) |
| llmgateway-byok | $4.00/M (list) | $20.00/M (list) |
| requesty-byok | $4.00/M (list) | $20.00/M (list) |
| aimlapi-byok | $4.00/M (list) | $20.00/M (list) |
| getvibe-byok | $1.00/M (list) | $5.00/M (list) |
| orcarouter-byok | $4.00/M (list) | $20.00/M (list) |
| aihubmix-byok | $4.00/M (list) | $20.00/M (list) |
| infron-byok | $4.00/M (list) | $20.00/M (list) |
| opengateway-byok | $4.00/M (list) | $20.00/M (list) |
| itera-byok | $4.00/M (list) | $20.00/M (list) |
| nano-gpt-byok | $4.00/M (list) | $20.00/M (list) |
| edenai-byok | $4.00/M (list) | $20.00/M (list) |
| abacus-byok | $4.00/M (list) | $20.00/M (list) |
| fluence-byok | $1.78/M (list) | $8.89/M (list) |
| cortecs-byok | $4.00/M (list) | $20.00/M (list) |
| jiekou-byok | $4.00/M (list) | $20.00/M (list) |
| kenari-byok | $4.00/M (list) | $20.00/M (list) |
| nearai-byok | $4.00/M (list) | $20.00/M (list) |

BYOK routes are billed by your own provider key — AnyRouter charges $0. Rates marked (list) are the provider's published list price.

## Benchmarks

- **GPQA Diamond**: 0.9
- **HLE**: 0.5
- **SciCode**: 0.7
- **OTIS Mock AIME**: 1.0
- **CursorBench**: 0.6
- **SimpleQA (verified)**: 0.7

Benchmark data from [Epoch AI](https://epoch.ai/benchmarks) (CC-BY 4.0).

## Source

- Upstream docs: https://platform.claude.com/docs/en/models/opus-5-5/overview