Claude Opus 4.8
AnthropicMULTIMODAL Proprietary
- Provider
- Anthropic
- Modality
- MULTIMODAL
- Parameters
- —
- Context window
- 1,000,000 tokens
- Weights
- Proprietary
- Released
- 28 May 2026
Claude Opus 4.8 (May 2026) is Anthropic's top tier — best-in-class agentic coding and reasoning, a 1M-token context and careful, low-error output, priced and paced as a flagship.
Best for
- Hardest reasoning and long-horizon agentic coding
- Frontier math, science and complex multi-file refactors
- Whole-codebase / large-document analysis (1M context)
- When you need the most capable widely-available Claude
How it compares — and the India angle
- Most expensive and slowest tier — Sonnet 4.6 gives ~99% of its coding quality at far lower cost and ~2x speed.
- Indian teams pay in USD ($5/$25 per 1M) — reserve Opus for genuinely hard tasks, route bulk work to Sonnet/Haiku.
- Trades blows with Gemini 3.1 Pro on science (GPQA) but leads on SWE-bench coding.
Benchmarks
Representative public scores (approximate, higher is better) for relative comparison. Check the provider for the latest official results.
GPQA Diamond94
SWE-bench Verified89
How to access
API ~$5 / 1M input, ~$25 / 1M output. Claude Pro/Max (~$20/mo, no India INR plan — ~₹1,800+ after FX/tax).
Access Claude Opus 4.8