Anthropic
Claude Opus 5
Claude Opus 5 is Anthropic’s flagship model for demanding reasoning, coding, and long-horizon agentic work. It is particularly strong at end-to-end software tasks, code review and bug finding, visual analysis...
Cost / 1M tokens
Very high usage$5.00
input
$0.50
cached input
$25.00
output
Context Window
1M
Up to 128K max output
Modalities
text, image, file → text
Claude tokenizer
Quickstart & API
anthropic/claude-opus-5Best for & Strengths
Key Strengths
Recommended Workloads in ChatOSS
- Complex development
- Large codebases
- Coding agents
Verified Evaluations
Benchmarks & Frontier Comparison
How Claude Opus 5 compares against leading open-weight and proprietary frontier models across independent agentic coding and reasoning suites.
| Benchmark (Metric) | Claude Opus 5 | DeepSeek V4.1 Flash | GLM 5.3 | Kimi K3.1 Pro | Claude Opus 5.5 |
|---|---|---|---|---|---|
| Agentic & Software Engineering | |||||
| ChatOSS Agentic Coding Index (%) | 68.3% | 63.2% | 58.3% | 65% | 74.1% |
| SWE-Bench Verified (%) | 97% | 91.5% | 95.4% | 94.8% | 97% |
| DeepSWE v1.1 (Pass@1 %) | 73.6% | 77% | 69% | 73.5% | 74.2% |
| Vibe Code Bench v1.1 (%) | 88.4% | 87.7% | 78.1% | 88.4% | 90.3% |
| Terminal-Bench 4.0 (%) | 53.53% | 42.3% | 42% | 46.2% | 65.2% |
| Code Migration (%) | 57.47% | 45.6% | 44.2% | 52% | 66.7% |
| Intelligence & Token Economics | |||||
| Artificial Analysis Intelligence Index (0–100) | 50.8 | 39.5 | 44.8 | 55.1 | 57.6 |
| Input Price (/ 1M tokens) | $5.00 | $0.15 | $1.40 | $2.00 | $4.00 |
| Output Price (/ 1M tokens) | $25.00 | $0.60 | $4.40 | $10.00 | $20.00 |
ChatOSS Agentic Coding Index
ChatOSS Benchmark Audit · 4-benchmark composite mean
SWE-Bench Verified
Vals AI · Terminus 2
DeepSWE v1.1
DeepSWE / Official Audit · Mini-SWE-Agent
Vibe Code Bench v1.1
Vals.ai · OpenHands
Terminal-Bench 4.0
Vals.ai / Artificial Analysis · Terminus 2
Terminal-Bench 2.1
Vals.ai · Terminus 2
Code Migration
Vals.ai · Vals evaluation harness
Artificial Analysis Intelligence Index
Artificial Analysis
GPQA Diamond (Pass@1)
Benchmark Audit
Humanity's Last Exam (Pass@1)
Artificial Analysis / Audit
Design Arena: AGENTICGAMEDEV
Design Arena · Rank #2 (53.4% win)
Design Arena: ANDROIDNATIVE
Design Arena · Rank #5 (55.3% win)
Design Arena: BLENDER3D
Design Arena · Rank #8 (58.9% win)
Design Arena: FULLSTACK
Design Arena · Rank #4 (57.3% win)
Active Provider Endpoints (11)
Upstream inference providers serving Claude Opus 5, with per-provider pricing, context limits, quantization, and 24-hour uptime.
| Provider | Input / 1M | Output / 1M | Cache Read / 1M | Context | Max Output | Quantization | Uptime (24h) |
|---|---|---|---|---|---|---|---|
Claude Platform on AWS claude-on-aws | $5.00 | $25.00 | $0.50 | 1M | 128K | — | 100.0% |
Google google-vertex/global | $5.00 | $25.00 | $0.50 | 1M | 128K | — | 97.5% |
Amazon Bedrock amazon-bedrock | $5.00 | $25.00 | $0.50 | 1M | 128K | — | 99.7% |
Azure azure/global | $5.00 | $25.00 | $0.50 | 1M | 128K | — | 0.0% |
Anthropic anthropic | $5.00 | $25.00 | $0.50 | 1M | 128K | — | 99.9% |
Amazon Bedrock amazon-bedrock/eu-west-1 | $5.50 | $27.50 | $0.55 | 1M | 128K | — | 100.0% |
Azure azure/us | $5.50 | $27.50 | $0.55 | 1M | 128K | — | — |
Google google-vertex/us | $5.50 | $27.50 | $0.55 | 1M | 128K | — | — |
Google google-vertex/europe | $5.50 | $27.50 | $0.55 | 1M | 128K | — | 100.0% |
Amazon Bedrock amazon-bedrock/us-east-1 | $5.50 | $27.50 | $0.55 | 1M | 128K | — | — |
Anthropic anthropic/fast | $10.00 | $50.00 | $1.00 | 1M | 128K | — | 100.0% |
Supported API Parameters
Parameters accepted by this model when called through ChatOSS or OpenRouter.
Deep-Dive Benchmarks & Teardowns
Independent benchmark analysis and real-world agent billing teardowns featuring Claude Opus 5.
2026-09-10 · 9 min read
DeepSeek V4.1 Flash: Opus 5-tier agentic coding at 1/33 the price
DeepSeek's new ~748B-parameter Flash model (552B backbone + 196B Engram memory) retires V4 Pro, ships native vision, and — on DeepSeek's own max-effort numbers — edges Claude Opus 5 and GPT-5.6 Sol on Terminal-Bench 2.1 and DeepSWE v1.1 while costing $0.15/$0.60 per million tokens. Full benchmark table, pricing math, and where the closed frontier still wins.
2026-08-31 · 12 min read
GLM-5.3 and GLM-5.3 Flash: Z.ai's one-two punch matches Claude and GPT at a tenth of the price
Z.ai shipped a post-trained flagship (GLM-5.3) and a brand-new 320B multimodal sibling (GLM-5.3 Flash) two weeks apart. We benchmark both against Claude Opus 5, Fable 5, and GPT-5.6 Sol — with charts, a comparison table, and the pricing math.
2026-08-14 · 6 min read
One hour on DeepSeek V4 Pro cost $0.28. The same hour on Claude and ChatGPT: 68–136× more.
31.2 million input tokens, 107K output tokens, 157 API calls — and 28 cents. Here's the real billing-log breakdown, what the identical token volume would have cost on Claude Opus 5, GPT-5.6 Sol, and Claude Fable 5, and the two numbers I had wrong before I checked.
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