Anthropic
Claude Opus 4.8
Claude Opus 4.8 is Anthropic's most capable generally available model in the Opus family. It supports text, image, and file inputs with text output, with reasoning support and a 1M-token...
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-4.8Best for & Strengths
Key Strengths
Recommended Workloads in ChatOSS
- Enterprise development
- Large repositories
- Coding agents
Verified Evaluations
Benchmarks & Frontier Comparison
How Claude Opus 4.8 compares against leading open-weight and proprietary frontier models across independent agentic coding and reasoning suites.
| Benchmark (Metric) | Claude Opus 4.8 | DeepSeek V4.1 Flash | GLM 5.3 | Kimi K3.1 Pro | Claude Opus 5.5 |
|---|---|---|---|---|---|
| Agentic & Software Engineering | |||||
| ChatOSS Agentic Coding Index (%) | 51.3% | 63.2% | 58.3% | 65% | 74.1% |
| SWE-Bench Verified (%) | 88.6% | 91.5% | 95.4% | 94.8% | 97% |
| DeepSWE v1.1 (Pass@1 %) | 59% | 77% | 69% | 73.5% | 74.2% |
| Vibe Code Bench v1.1 (%) | 82.72% | 87.7% | 78.1% | 88.4% | 90.3% |
| Terminal-Bench 4.0 (%) | 16.16% | 42.3% | 42% | 46.2% | 65.2% |
| Code Migration (%) | 47.2% | 45.6% | 44.2% | 52% | 66.7% |
| Intelligence & Token Economics | |||||
| Artificial Analysis Intelligence Index (0–100) | 41.8 | 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
Design Arena: AGENTICGAMEDEV
Design Arena · Rank #4 (55.4% win)
Design Arena: AGENTICHTMLSLIDES
Design Arena · Rank #3 (55.6% win)
Design Arena: AGENTICSLIDES
Design Arena · Rank #1 (64.8% win)
Design Arena: AGENTICSLIDES(HTML)
Design Arena · Rank #3 (56% win)
Active Provider Endpoints (11)
Upstream inference providers serving Claude Opus 4.8, 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% |
Azure azure/global | $5.00 | $25.00 | $0.50 | 1M | 128K | — | 0.0% |
Amazon Bedrock amazon-bedrock | $5.00 | $25.00 | $0.50 | 1M | 128K | — | 99.0% |
Google google-vertex/global | $5.00 | $25.00 | $0.50 | 1M | 128K | — | 99.5% |
Anthropic anthropic | $5.00 | $25.00 | $0.50 | 1M | 128K | — | 99.7% |
Azure azure/us | $5.50 | $27.50 | $0.55 | 1M | 128K | — | — |
Amazon Bedrock amazon-bedrock/us | $5.50 | $27.50 | $0.55 | 1M | 128K | — | 100.0% |
Google google-vertex/us | $5.50 | $27.50 | $0.55 | 1M | 128K | — | — |
Amazon Bedrock amazon-bedrock/eu-west-1 | $5.50 | $27.50 | $0.55 | 1M | 128K | — | 100.0% |
Google google-vertex/europe | $5.50 | $27.50 | $0.55 | 1M | 128K | — | 100.0% |
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.
Compare Similar Models
Browse all models →Anthropic
Claude Haiku 5.5
Claude Haiku 5.5 is Anthropic's small, fast model for high-volume, cost-sensitive work such as summarization, subagents, and browser use. It succeeds Claude Haiku 4.5 with stronger coding, computer use, and...
Anthropic
Claude Sonnet 5.5
Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is especially strong at building features, fixing bugs, and producing...
Anthropic
Claude Opus 5.5
Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...
Anthropic
Claude Fable 5.1
Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and visual...
Moonshot AI
Kimi K3.1 Pro
Kimi K3.1 Pro is Moonshot AI's flagship open-weight multimodal reasoning model and a post-trained successor to Kimi K3, with a 1M-token context window. It is built for long-horizon coding, 3D...
Z.ai (GLM)
GLM 5.3
GLM-5.3 is a large-scale reasoning model from Z.ai, built for complex software engineering and long-horizon agent tasks. It supports text input and output with a 1M-token context window, and improves...