Claude Opus 4.1
Claude Opus 4.1 introduces refined RL alignment, higher symbolic reasoning fidelity, and pruned test-time thinking paths for reduced latency on complex tasks.
200k
~150k words input
$15 / $75
Prompt / Completion per 1M
77.2 % resolved
SWE-bench Verified
Cloud Managed
Zero local VRAM
Holistic Capability Distribution
Normalized 0-100 rating vectors balanced across intelligence, throughput, and economics.
Verified LLM Benchmarks
Empirical evaluations across academic reasoning, software engineering, agentic execution, and human preference.
Inference Latency & Generation Throughput
Empirical telemetry benchmarking generation throughput (Tokens/Second) and Time to First Token (TTFT).
Measured under concurrent production load
p95 latency: 1540 ms
Across 1,500 monitored requests
Architectural Strengths vs. Operational Considerations
An objective technical balance sheet analyzing deployment advantages and production constraints.
Key Architectural Strengths
- Reduced thinking token overhead by 18% while simultaneously increasing mathematical pass rates.
- Significantly enhanced resistance to reasoning loops and cyclic code rewrites.
- Native multi-lingual reasoning with improved translation and synthesis across 40+ languages.
Operational Considerations
- Premium tier token pricing ($15/$75 per 1M tokens) remains in effect.
Hardware & Execution Parameters
Genealogical Provenance
Mid-cycle post-training refinement focusing on reasoning trajectory efficiency.
anthropic claude 4 opus 202505
Claude Opus 4.1
Architecture Engineering & Capability Deep-Dive
Topology & Attention Mechanics
Iterative alignment enhancement on the Claude Opus 4 base checkpoint using process-supervised reward models (PRMs).
Evaluation Profile & Reasoning Capabilities
Pruned chain-of-thought routing suppresses tangential reasoning paths, leading to faster solution convergence.
Inference Economics & Cost Optimization
Prompt caching supported with standard 90% read discount.
Primary Production Workloads & Suitability
Cloud Deployment Architecture & Hardware Sizing
Cloud Deployment Architecture
Distributed enterprise serving infrastructure, autoscaling semantics, and runtime execution profile.
Proprietary commercial model hosted on managed multi-region clusters with automatic autoscaling, high availability, and prompt prefix caching.
Multi-Tenant Cloud API
Continuous autoscaling with regional failover
0 GB Local VRAM
Inference executed on hyperscaler accelerator clusters
200k tokens
Supported with automated KV cache prefix compression
SDK Installation
Official Repositories & Papers
Compare Showdowns
Claude Opus 4.1 vs Claude Opus 4
Compare Claude Opus 4.1 against Claude Opus 4's verified benchmarks, context window, and pricing.
Claude Opus 4.1 vs Claude Sonnet 4.5
Compare Claude Opus 4.1 against Claude Sonnet 4.5's verified benchmarks, context window, and pricing.
Claude Opus 4.1 vs Claude Sonnet 4
Compare Claude Opus 4.1 against Claude Sonnet 4's verified benchmarks, context window, and pricing.
Claude Opus 4.1 vs Claude Haiku 4.5
Compare Claude Opus 4.1 against Claude Haiku 4.5's verified benchmarks, context window, and pricing.
Commercial Token Rates & Cost Estimator
$15.00 / 1M
Standard prompt context ingestion
$75.00 / 1M
Generated completion & thinking tokens
$1.50 / 1M
Re-used prompt prefix context
Monthly Production Cost Simulator
$3,690.00
Includes prompt caching
-$810.00
Saved via prefix context caching
Comparable Foundation Architectures
Alternative foundation models with comparable intelligence benchmarks, context windows, and deployment profiles.
Claude Opus 4
Claude Opus 4 is Anthropic's flagship frontier reasoning model for the Claude 4 generation, featuring an advanced hybrid test-time reasoning engine, 200k context window, and breakthrough scores on graduate-level STEM and multi-step deduction.
Claude Sonnet 4.5
Claude Sonnet 4.5 establishes a new frontier standard in autonomous software engineering with 80%+ SWE-bench Verified resolution, expanded 250k context, and optimized test-time execution.
Claude Sonnet 4
Claude Sonnet 4 is Anthropic's premier balanced engineering model for the Claude 4 generation, engineered for rapid autonomous coding agents, multi-step tool execution, and cost-effective enterprise workflows.
Claude Haiku 4.5
Claude Haiku 4.5 delivers lightning-fast inference and remarkable intelligence density, operating at sub-200ms latency for real-time customer workflows, classification, and content moderation.
SDK Installation & API Integration
import Anthropic from '@anthropic-ai/sdk';
const anthropic = new Anthropic();
const msg = await anthropic.messages.create({
model: 'claude-4-1-opus-20250814',
max_tokens: 4096,
messages: [{ role: 'user', content: 'Analyze the algorithmic complexity of persistent treaps.' }],
});
console.log(msg.content);Frequently Asked Questions about Claude Opus 4.1
Engineering specifications, VRAM sizing, commercial licensing terms, token economics, and empirical benchmark evaluations.
Opus 4.1 features updated RL verifier models that reduce output latency by 18% while lifting benchmark scores on SWE-bench Verified from 75.8% to 77.2%.