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.
82
Coding
95
Writing
93
Research
10
Images
28
Value
90
Long Context
Use this when
Complex multi-step reasoning, long-document analysis, and high-stakes writing tasks where output quality is non-negotiable.
Skip this if
You need fast turnaround, are running high-volume batch jobs, or your tasks don't demand flagship-level reasoning — Claude Sonnet 4.6 covers 80% of use cases at a fraction of the cost.
Exceptional instruction-following and nuance in complex, multi-constraint prompts
200K context window handles entire codebases, legal documents, or research corpora in a single pass
Notably strong at structured reasoning, argument analysis, and synthesis across long inputs
Anthropic's safety tuning produces reliable, consistent outputs with fewer hallucinations on factual tasks
Weaknesses
At $25/1M output tokens, it's expensive for high-volume or iterative workflows compared to Claude Sonnet 4.6 or GPT-5.4
Slower inference makes it poorly suited for real-time or latency-sensitive applications
No native image generation capability; multimodal input only, not output
Monthly cost estimate
See what Anthropic: Claude Opus 4.5 actually costs at your usage level
Input tokens / month1M
10k50M
Output tokens / month500k
10k25M
Input cost
$5.00
Output cost
$12.50
Total / month
$17.50
Based on Anthropic: Claude Opus 4.5 API pricing: $5/1M input · $25/1M output. Real costs vary by provider discounts and caching. Check the provider for exact current rates.
Price History
Anthropic: Claude Opus 4.5 pricing over time
→0% since Mar 27
2 data points · tracked daily since Mar 27, 2026
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Complex multi-step reasoning, long-document analysis, and high-stakes writing tasks where output quality is non-negotiable.. 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
$15.00/1M in
$75.00/1M 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 4.1 is Anthropic's top-tier flagship model, designed for the most demanding tasks requiring deep reasoning, nuanced writing, and complex multi-step analysis. It sits at the apex of the Claude 4 family, prioritizing capability over cost and speed.
Verdict
Anthropic's most capable model for demanding professional work, but its steep output cost demands justification.
Quality score
83%
Pricing
$15.00/1M in
$75.00/1M out
Speed
Deliberate
Best for high-stakes professional work where output quality justifies premium pricing — legal analysis, advanced research synthesis, and complex agentic workflows.
Context
200k tokens
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.
FlagshipPremiumReasoningLong ContextAgentic
Best for
High-stakes professional work where output quality justifies premium pricing — legal analysis, advanced research synthesis, and complex agentic workflows.
Pricing moves, ranking shifts, and capability updates.
New ModelMar 27, 2026
Anthropic: Claude Opus 4.5 — added to UseRightAI
Anthropic: Claude Opus 4.5 (Anthropic) is now indexed. It supersedes Claude 4 Haiku. 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.
Anthropic: Claude Opus 4.5 is best for complex multi-step reasoning, long-document analysis, and high-stakes writing tasks where output quality is non-negotiable.. It is a strong fit when that workflow matters more than the tradeoffs around balanced pricing and deliberate speed.
When should I avoid Anthropic: Claude Opus 4.5?
You need fast turnaround, are running high-volume batch jobs, or your tasks don't demand flagship-level reasoning — Claude Sonnet 4.6 covers 80% of use cases at a fraction of the cost.
What is a cheaper alternative to Anthropic: Claude Opus 4.5?
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 4.5?
Anthropic: Claude 3.5 Sonnet is the better pick when response time matters more than maximum depth or premium quality.
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