Claude Opus 4.8
AnthropicMay 28, 2026N/A
May's Opus generation — described as a modest but tangible step up from 4.7, and still a benchmark fixture: Grok 4.5 and Qwen3.8 Max are routinely graded against its max-effort numbers.
- Status
- Generally available
- License
- Proprietary API
- Context window
- 200K
- Max output
- 64K
- Input · $/M
- $5
- Output · $/M
- $25
- Cached input · $/M
- $0.5
- Blended · $/M
- $10.00
- Parameters
- Undisclosed
- Inputs
- Text + images
Benchmarks
This model has no published scores on the benchmarks we track yet. Specs and pricing below the fold are still fully sourced.
Reasoning & knowledge
GPQA Diamond
no public score
MMLU-Pro
no public score
Humanity's Last Exam
no public score
ARC-AGI-2
no public score
Coding
SWE-bench Verified
no public score
SWE-bench Pro
no public score
LiveCodeBench
no public score
Agents & computer use
Terminal-Bench 2
no public score
OSWorld 2.0
no public score
BrowseComp
no public score
Math
AIME 2026
no public score
Known strengths
- Proven agent reliability
- Widely benchmarked reference point