Claude Opus 4.8
The default choice when quality matters more than budget.
Overview
Claude Opus 4.8, released May 28 2026, is Anthropic's most capable general-access model, with strong gains in agentic coding and math and notable honesty improvements. 1M-token context.
Skill profile
Three independent measures
What people prefer, what the model can do, what the market uses. Each source has its biases and none is enough on its own: we show them side by side, never blended.
What do these scores mean?
PhD-level science questions (physics, chemistry, biology), with no tool access.
Resolving real GitHub issues under real conditions (SWE-bench Verified).
Competition-level math problems.
General knowledge across dozens of academic subjects.
Python code generation from specifications.
Strengths
- Top-tier reasoning
- Excellent at code
- Strong French quality
- World-class on Arena
Limitations
- High output cost
- Average speed
Who is it for
- you need advanced reasoning or analysis
- you build with a coding agent
- you work in French
- your data must stay in the EU
- your budget is tight
- you need very fast responses
Ideal use cases
- Long document analysis
- Agentic coding
- Complex research
- Premium writing
- Strategic tasks
Access & availability
Key specifications
What it costs per month
Estimate from sourced API prices and a hardware tier for self-hosting. Assumptions are editable.
Assumptions: 36-month amortisation, 0.25 €/kWh, 22 days/month, 1 $ = 0.92 €. Excludes labour, software licences, redundancy.
nAIvigate Trust Index
What the vendor offers and documents for professional use in Europe. An undocumented criterion counts as zero and stays visible: the score rises when the vendor publishes, not when we assume.
19/20 criteria documented · 95 %
See the criteria▾
Trust Index badge
Show this score in your docs, README or security page. It updates automatically.
[](https://naivigate.com/en/model/claude-opus-4-8)Data & compliance
What we know, line by line, with source and date. These lines feed the Data and Enterprise families of the Trust Index above. GDPR compliance depends on your processing, not on the model alone.
| EU data residency | No |
| Data processing agreement (DPA) | Yes |
| Transfer outside the EU | Yes |
| Training on your data | No |
| Configurable retention | Yes |
| Zero Data Retention | On request |
| Self-hostable | No |
| Declared hosting | US |
| Anonymisable data | Yes |
Quality of this card’s data
This score measures the quality of the data on this card: price, context, Elo, licence, documented, sourced and fresh. It measures neither the model nor its compliance: for that, see the Trust Index above.
6/6 documented · 4/6 primary sources · 2 older than 90 days
Advanced data · for expertsArchitecture, modalities, detailed cost, full benchmarks▾
| Arena Elo | 1481 |
| MMLU | 91.5% |
| GPQA | 93.6% |
| HumanEval | 96.5% |
| SWE-Bench | 88.6% |
| MATH | 96.7% |