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Claude Opus 4 vs Claude Opus 5

Claude Opus 5 leads the LLM Stats Score 54.8 to 27.7. Claude Opus 5 is 3.0x cheaper per token.

Anthropic · Anthropic · Updated for 2026

Which is better?

Claude Opus 5 leads the overall LLM Stats Score 54.8 to 27.7, ranking #3 overall.

On price, Claude Opus 5 is roughly 3.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Claude Opus 5 also accepts a larger context window (1,000,000 input tokens), making it the stronger choice for long documents and large codebases.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Claude Opus 4

  • you want predictable pricing at $15.00/M input and $75.00/M output

Choose Claude Opus 5

  • overall performance matters — it scores 54.8 and ranks #3 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • cost matters — it's about 3.0x cheaper per token
  • you process long inputs — it offers a 1,000,000 token context window
  • you want the most recent training data — it shipped Jul 2026

At a glance

The differences that matter most.

Claude Opus 4
Anthropic
Claude Opus 5
Anthropic
Core performance indexes
LLM Stats Score
27.7
#145
54.8
#3
Reasoning
27.7
#139
53.8
#4
Coding
17.4
#126
41.0
#12
Agents
8.2
#138
39.4
#8
Cost, coverage & limits
Benchmark wins
—
—
Input price
$15.00 / M
$5.00 / M
Output price
$75.00 / M
$25.00 / M
Context window
200,000
1,000,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

2 shared
Index
Claude Opus 4
Claude Opus 5
Vision
12.5#104
37.4#6
Tool use
19.2#60
25.1#31
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

9 reported for Claude Opus 4 · 13 for Claude Opus 5

No common benchmarks found

Claude Opus 4 and Claude Opus 5don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Claude Opus 5 costs less

For input processing, Claude Opus 4 ($15.00/1M tokens) is 3.0x more expensive than Claude Opus 5 ($5.00/1M tokens).

For output processing, Claude Opus 4 ($75.00/1M tokens) is 3.0x more expensive than Claude Opus 5 ($25.00/1M tokens).

In conclusion, Claude Opus 4 is more expensive than Claude Opus 5.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Tue Sep 22 2026 • llm-stats.com
Anthropic
Claude Opus 4
Input tokens$15.00
Output tokens$75.00
Best providerAnthropic
Anthropic
Claude Opus 5
Input tokens$5.00
Output tokens$25.00
Best providerAnthropic
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Claude Opus 5 accepts 1,000,000 input tokens compared to Claude Opus 4's 200,000 tokens. Claude Opus 5 can generate longer responses up to 128,000 tokens, while Claude Opus 4 is limited to 32,000 tokens.

Anthropic
Claude Opus 4
Input200,000 tokens
Output32,000 tokens
Anthropic
Claude Opus 5
Input1,000,000 tokens
Output128,000 tokens
Tue Sep 22 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Opus 4 and Claude Opus 5 support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Claude Opus 4

Text
Images
Audio
Video

Claude Opus 5

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Claude Opus 4

Proprietary

Closed source

Claude Opus 5

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Opus 4 was released on 2025-05-22, while Claude Opus 5 was released on 2026-07-24.

Claude Opus 5 is 14 months newer than Claude Opus 4.

Claude Opus 4

May 22, 2025

1.3 years ago

Claude Opus 5

Jul 24, 2026

2 months ago

1.2yr newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

Claude Opus 4 is available from Anthropic, Bedrock, Google. Claude Opus 5 is available from Anthropic, DeepInfra.

Claude Opus 4

anthropic logo
Anthropic
Input Price:Input: $15.00/1MOutput Price:Output: $75.00/1M
bedrock logo
AWS Bedrock
Input Price:Input: $15.00/1MOutput Price:Output: $75.00/1M
google logo
Google
Input Price:Input: $15.00/1MOutput Price:Output: $75.00/1M

Claude Opus 5

anthropic logo
Anthropic
Input Price:Input: $5.00/1MOutput Price:Output: $25.00/1M
deepinfra logo
Deepinfra
Input Price:Input: $5.00/1MOutput Price:Output: $25.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Claude Opus 4 and Claude Opus 5 side-by-side, then vote on the output you prefer.

Claude Opus 4
✓ Preferred
Claude Opus 5
Open in Playground

FAQ

Common questions about Claude Opus 4 vs Claude Opus 5.

Which is better, Claude Opus 4 or Claude Opus 5?

Claude Opus 5 leads the LLM Stats Score 54.8 to 27.7. Claude Opus 4 is made by Anthropic and Claude Opus 5 is made by Anthropic. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Opus 4 compare to Claude Opus 5 in benchmarks?

Claude Opus 4 scores MMMLU: 88.8%, TAU-bench Retail: 81.4%, GPQA: 79.6%, MMMU (validation): 76.5%, AIME 2025: 75.5%. Claude Opus 5 scores BrowseComp: 90.8%, BioMysteryBench: 90.1%, OSWorld 2.0: 70.6%, DeepSWE 1.1: 68.8%, Humanity's Last Exam: 64.7%.

Is Claude Opus 4 cheaper than Claude Opus 5?

Claude Opus 5 is 3.0x cheaper for input tokens. Claude Opus 4 costs $15.00/M input and $75.00/M output via anthropic. Claude Opus 5 costs $5.00/M input and $25.00/M output via anthropic.

What are the context window sizes for Claude Opus 4 and Claude Opus 5?

Claude Opus 4 supports 200K tokens and Claude Opus 5 supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Opus 4 and Claude Opus 5?

Key differences include LLM Stats Score (27.7 vs 54.8), context window (200K vs 1.0M), input pricing ($15.00 vs $5.00/M). See the full comparison above for benchmark-by-benchmark results.

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