Claude Opus
Anthropic's Opus line: highest-capability general models for coding and agents.
Current versionConfirmed
Claude Opus 5.5 claude-opus-5-5
Context 1M · max output 128K · text, image, pdf · tool use yes · structured output yes Vendor-documented
| Platform | Input / 1M | Output / 1M | Cached input / 1M | Batch discount | Effective |
|---|---|---|---|---|---|
| Direct API | $4 | $20 | $0.2 | 50% | 2026-09-22 Vendor-documented |
| AWS Bedrock | $4 | $20 | $0.4 | 50% | 2026-09-22 Community-reported |
| Google Vertex AI | $4 | $20 | $0.4 | 50% | 2026-09-22 Community-reported |
Availability
| Platform | Region | Claude Opus 5.5 | Claude Opus 5 |
|---|---|---|---|
| Direct API | global | GA 22 Sept 2026 | GA 10 Jun 2026 |
| AWS Bedrock | ap-south-1 | PREVIEW 23 Sept 2026 | GA 8 Jul 2026 |
| AWS Bedrock | us-east-1 | GA 22 Sept 2026 | GA 10 Jun 2026 |
| AWS Bedrock | us-west-2 | GA 22 Sept 2026 | GA 10 Jun 2026 |
| Google Vertex AI | global | GA 22 Sept 2026 | GA 10 Jun 2026 |
| Azure AI Foundry | eastus2 | PREVIEW 22 Sept 2026 | GA 24 Jun 2026 |
All versions
- Claude Opus 5.5Confirmed
claude-opus-5-5· released 22 Sept 2026 - Claude Opus 5ConfirmedSuperseded
claude-opus-5· released 10 Jun 2026
Proofs across versions
| Suite | Version | Endpoint | Results | Run cost | Date |
|---|---|---|---|---|---|
| RAG over documents Measured by us | Claude Opus 5.5 | Direct API · global | Answer accuracy: 91.2% Citation faithfulness: 95% Hallucination rate: 2.1% | $18.40 | 23 Sept 2026 |
| Agents and tool use Measured by us | Claude Opus 5.5 | AWS Bedrock · us-east-1 | Task success rate: 84.5% Median steps: 7 steps Error recovery: 78% | $41.70 | 23 Sept 2026 |
| Cost and latency Measured by us | Claude Opus 5.5 | Direct API · global | Cost per task: 0.037 USD Time to first token (p50): 1.9 s Output speed (p50): 58 tok/s | $3.70 | 23 Sept 2026 |
| Cost and latency Measured by us | Claude Opus 5.5 | AWS Bedrock · ap-south-1 | Cost per task: 0.039 USD Time to first token (p50): 1.4 s Output speed (p50): 52 tok/s | $3.90 | 23 Sept 2026 |
| RAG over documents Measured by us | Claude Opus 5 | Direct API · global | Answer accuracy: 90.4% Citation faithfulness: 94.1% Hallucination rate: 2.6% | $23.10 | 23 Sept 2026 |
| Agents and tool use Measured by us | Claude Opus 5 | AWS Bedrock · us-east-1 | Task success rate: 83% Median steps: 8 steps Error recovery: 75.5% | $52.90 | 23 Sept 2026 |