Anthropic's most capable model for demanding professional work, but its steep output cost demands justification.
88
Coding
96
Writing
93
Research
0
Images
8
Value
89
Long Context
Use this when
High-stakes professional work where output quality justifies premium pricing — legal analysis, advanced research synthesis, and complex agentic workflows.
Skip this if
You're building high-volume APIs, need real-time responses, or your tasks are well-handled by mid-tier models like Claude Sonnet 4 or GPT-4.1 Mini.
Pricing
$15.00/1M in
$75.00/1M out
→0%since May 2026
Context
200k tokens
Speed
Deliberate
Output pricing at $75/1M tokens is among the highest in the market — nearly 3x GPT-4.1's output cost. Batch API discounts may be available through Anthropic. Context window is 200K but very long prompts at Opus pricing can become extremely expensive quickly. Note: supersedes field lists Claude 4 Haiku, which is likely a data error — Opus 4.1 more logically succeeds Claude Opus 4.
Exceptional instruction-following and nuanced output quality, outperforming Claude Sonnet 4 on complex multi-constraint tasks
200K context window handles full codebases, lengthy legal documents, or book-length manuscripts in a single pass
Superior performance on multi-step reasoning chains and agentic tasks requiring extended planning
Best-in-class prose quality for high-stakes writing such as executive communications, grant proposals, and literary editing
Weaknesses
At $15/$75 per million tokens, it is 5x more expensive than Claude Sonnet 4 and significantly pricier than GPT-4.1 and Gemini 2.5 Pro for comparable tasks
Deliberate inference speed makes it poorly suited for real-time applications or high-volume, low-latency pipelines
No native image generation capability despite multimodal input support
Real-world use cases
What people actually use Anthropic: Claude Opus 4.1 for.
Reviewing and drafting 100-page legal contracts with nuanced clause-by-clause analysis
Building autonomous research agents that synthesize findings across dozens of academic papers in a single context
Generating polished, publication-ready technical documentation or investor-facing reports from raw notes
Price History
Anthropic: Claude Opus 4.1 pricing over time
→0% since May 9
48 data points · tracked daily since May 9, 2026
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High-stakes professional work where output quality justifies premium pricing — legal analysis, advanced research synthesis, and complex agentic workflows.. Start free — no card required.
Recommendations are made independently based on real-world use and public benchmarks. See our disclosures for details.
Compare alternatives
Similar models worth checking before you commit.
AnthropicPremium
Anthropic: Claude 3.5 Sonnet
Claude 3.5 Sonnet is Anthropic's mid-cycle flagship model, balancing strong reasoning, coding, and instruction-following with a 200K context window. It sits between Haiku and Opus in Anthropic's lineup, offering near-flagship quality at a lower cost than top-tier models.
Verdict
One of the best models for coding and complex instruction-following, but its premium pricing demands premium use cases.
Quality score
81%
Pricing
$6.00/1M in
$30.00/1M out
Speed
Balanced
Best for complex coding tasks, multi-step reasoning, and long-document analysis where gpt-4o-class quality is needed without paying for the absolute top tier.
Context
200k tokens
Pricing at $6 input / $30 output per million tokens is significantly higher than GPT-4o ($2.50/$10). Best accessed via Anthropic API or Amazon Bedrock. Claude 3.5 Sonnet (October 2024 version) supersedes the June 2024 release with improved performance.
Claude Opus 4 is Anthropic's most capable flagship model, designed for complex reasoning, nuanced writing, and sophisticated multi-step tasks. It sits at the top of the Claude 4 family, prioritizing depth and quality over speed.
Verdict
Anthropic's best model for when quality matters more than speed or cost.
Quality score
84%
Pricing
$30.00/1M in
$150.00/1M out
Speed
Deliberate
Best for demanding professional tasks requiring deep reasoning, nuanced judgment, and high-quality long-form output.
Context
200k tokens
At $15 input / $75 output per 1M tokens, Opus 4 is one of the most expensive models available. Anthropic recommends using Claude Sonnet 4 for most production use cases and reserving Opus 4 for tasks explicitly requiring maximum capability.
FlagshipPremiumReasoningLong ContextAgentic
Best for
Demanding professional tasks requiring deep reasoning, nuanced judgment, and high-quality long-form output.
Claude Opus 4.5 is Anthropic's flagship reasoning and writing model, offering deep analytical capability and nuanced instruction-following across a 200K context window. It sits at the top of the Claude 4 lineup, prioritizing quality over speed.
Verdict
Anthropic's most capable model delivers best-in-class reasoning and writing quality, but the steep output cost demands genuinely complex use cases to justify it.
Quality score
82%
Pricing
$5.00/1M in
$25.00/1M out
Speed
Deliberate
Best for complex multi-step reasoning, long-document analysis, and high-stakes writing tasks where output quality is non-negotiable.
Context
200k tokens
Pricing is $5 input / $25 output per 1M tokens — identical output cost to GPT-5.4 tier models. Note the 'Supersedes Claude 4 Haiku' label appears to be a data anomaly; Opus 4.5 is the top-tier model, not a Haiku replacement. Confirm model availability on the Anthropic API dashboard as Opus-tier models sometimes have access restrictions.
Pricing moves, ranking shifts, and capability updates.
New ModelMar 27, 2026
Anthropic: Claude Opus 4.1 — added to UseRightAI
Anthropic: Claude Opus 4.1 (Anthropic) is now indexed. It supersedes Claude 4 Haiku. Anthropic's most capable model for demanding professional work, but its steep output cost demands justification.
Anthropic: Claude Opus 4.1 is best for high-stakes professional work where output quality justifies premium pricing — legal analysis, advanced research synthesis, and complex agentic workflows.. It is a strong fit when that workflow matters more than the tradeoffs around premium pricing and deliberate speed.
When should I avoid Anthropic: Claude Opus 4.1?
You're building high-volume APIs, need real-time responses, or your tasks are well-handled by mid-tier models like Claude Sonnet 4 or GPT-4.1 Mini.
What is a cheaper alternative to Anthropic: Claude Opus 4.1?
Meta: Llama 3.1 8B Instruct is the lower-cost option to compare first when you want a similar workflow fit with less token spend.
What is a faster alternative to Anthropic: Claude Opus 4.1?
Anthropic: Claude 3.5 Sonnet is the better pick when response time matters more than maximum depth or premium quality.
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