Project AURIONAI Use-Cases Research & Innovation
Anthropic
LLM

Claude Opus 4.1

Anthropic upgrade to Claude Opus 4 for coding, agentic tasks and reasoning, offered in Claude apps, Claude Code, the API, Amazon Bedrock and Vertex AI. Anthropic retired it on the Claude API on 5 August 2026.

AnthropicAnthropicUSAClaudeFamily
Bar chart of SWE-bench Verified accuracy showing Claude Opus 4.1 against earlier Claude models.
Levelmodel
ClassLLM
Parametersnot in the notes
Contextnot in the notes
Released5 Aug 2025
Opennessproprietary
Runs onnot in the notes
Statusshut down

Benchmark Results

vendor-reported
SWE-bench Verifiedcoding
No extended thinking; bash and string-replace file editor scaffold; full 500 problemsvendor-reported
74.5
050100

Score in %. Higher is better.

Anthropic announcement5 Aug 2025 anthropic.com
Where this comes from
Every score names who ran it: vendor-reported, maintainer-run or independent. A rank is shown with the population it was ranked in (gap rule 3).

Lineage

successor
Claude Opus 4 to Claude Opus 4.1: successor, high confidenceClaude Opus 4Claude Opus 4Anthropic, May 2025Claude Opus 4.1Claude Opus 4.1Anthropic, Aug 2025
AnthropicClaude Opus 4 is the parent (successor)high confidencepress claim
Where this comes from
Parent and child relations from model cards, Hugging Face base_model fields and the genealogy tables of the research notes. The tree shows two generations each way, 2 models. Confidence and evidence are the notes' own.

R&D Topics

Agents and tool useproduced byFrontier pretraining scalingproduced byReasoning via large-scale RLproduced by

Identity

Developer
Anthropic
Family
Claude
Released
5 Aug 2025 sourcesannouncement page
Weights published
–
Record checked
11 Oct 2026
Where this comes from
Developer and dates from the research notes. Release date is the vendor's public announcement; weights date is when open weights were published.

Architecture and Size

Architecture
not in the notes
Total parameters
– sources
Active parameters
–
Checkpoint parameters
–
Context length
not in the notes
Input
not in the notes
Output
not in the notes
Where this comes from
Parameter counts as the developer states them. Where the checkpoint holds a different total, both are shown (register A16).

Openness and Access

Openness
proprietary
Licence
Proprietary sources
Access routes
API, consumer app, cloud marketplace
Where this comes from
The licence file governs over registry tags and aggregator labels.

Deployment

Runs on
not in the notes
Footprint
API model id claude-opus-4-1-20250805; retired on the Claude API on 5 August 2026 (partner platforms set their own dates)
Runtimes
not in the notes
Where this comes from
Deployment tiers and runtimes as named in the notes. Footprint is the notes' figure, not a measurement by AURION.

Indonesia

Indonesian support
not stated
Regional languages
not in the notes
Jakarta hosting
unknown
Languages
not in the notes
Where this comes from
Indonesia fields are carried on every model; unknown is an allowed value.

Industry Use Cases

No industry use case links this model.

Sources

  1. anthropic.com/news/claude-opus-4-1 https://www.anthropic.com/news/claude-opus-4-1
  2. platform.claude.com/docs/en/about-claude/model-deprecations.md https://platform.claude.com/docs/en/about-claude/model-deprecations.md

To cite this page: Project AURION, AI Use-Cases Research & Innovation, "Claude Opus 4.1", https://aurion.semai.id/models/anthropic-claude-opus-4-1/, records of October 2026.