Model Comparison

Claude Opus 5 vs GPT-4.1Which is better in 2026?

Claude Opus 5 significantly outperforms across most benchmarks. GPT-4.1 is 2.9x cheaper per token.

Verdict: Claude Opus 5 vs GPT-4.1 — which is better?

Claude Opus 5 (by Anthropic) and GPT-4.1 (by OpenAI) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Claude Opus 5 outperforms in 1 benchmarks (Humanity's Last Exam), while GPT-4.1 is better at 0 benchmarks. Claude Opus 5 significantly outperforms across most benchmarks.

On price, GPT-4.1 is roughly 2.9x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

GPT-4.1 also accepts a larger context window (1,047,576 input tokens), making it the stronger choice for long documents and large codebases.

Choose Claude Opus 5 if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • you want the most recent training data — it shipped Jul 2026

Choose GPT-4.1 if…

  • cost matters — it's about 2.9x cheaper per token
  • you process long inputs — it offers a 1,047,576 token context window

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Claude Opus 5 outperforms in 1 benchmarks (Humanity's Last Exam), while GPT-4.1 is better at 0 benchmarks.

Claude Opus 5 significantly outperforms across most benchmarks.

Sun Jul 26 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT-4.1 costs less

For input processing, Claude Opus 5 ($5.00/1M tokens) is 2.5x more expensive than GPT-4.1 ($2.00/1M tokens).

For output processing, Claude Opus 5 ($25.00/1M tokens) is 3.1x more expensive than GPT-4.1 ($8.00/1M tokens).

In conclusion, Claude Opus 5 is more expensive than GPT-4.1.*

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

Lowest available price from all providers
Sun Jul 26 2026 • llm-stats.com
Anthropic
Claude Opus 5
Input tokens$5.00
Output tokens$25.00
Best providerAnthropic
OpenAI
GPT-4.1
Input tokens$2.00
Output tokens$8.00
Best providerOpenAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GPT-4.1 accepts 1,047,576 input tokens compared to Claude Opus 5's 1,000,000 tokens. Claude Opus 5 can generate longer responses up to 128,000 tokens, while GPT-4.1 is limited to 32,768 tokens.

Anthropic
Claude Opus 5
Input1,000,000 tokens
Output128,000 tokens
OpenAI
GPT-4.1
Input1,047,576 tokens
Output32,768 tokens
Sun Jul 26 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Opus 5 and GPT-4.1 support multimodal inputs.

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

Claude Opus 5

Text
Images
Audio
Video

GPT-4.1

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 5

Proprietary

Closed source

GPT-4.1

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Opus 5 was released on 2026-07-24, while GPT-4.1 was released on 2025-04-14.

Claude Opus 5 is 16 months newer than GPT-4.1.

Claude Opus 5

Jul 24, 2026

1 days ago

1.3yr newer
GPT-4.1

Apr 14, 2025

1.3 years ago

Knowledge Cutoff

When training data ends

GPT-4.1 has a documented knowledge cutoff of 2024-06-01, while Claude Opus 5's cutoff date is not specified.

We can confirm GPT-4.1's training data extends to 2024-06-01, but cannot make a direct comparison without Claude Opus 5's cutoff date.

Claude Opus 5

—

GPT-4.1

Jun 2024

Provider Availability

Claude Opus 5 is available from Anthropic. GPT-4.1 is available from OpenAI.

Claude Opus 5

anthropic logo
Anthropic
Input Price:Input: $5.00/1MOutput Price:Output: $25.00/1M

GPT-4.1

openai logo
OpenAI
Input Price:Input: $2.00/1MOutput Price:Output: $8.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Anthropic
Higher Humanity's Last Exam score (64.7% vs 5.4%)
OpenAI
Larger context window (1,047,576 tokens)
Less expensive input tokens
Less expensive output tokens
AnthropicClaude Opus 5
OpenAIGPT-4.1
Compare in Playground

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Claude Opus 5 and GPT-4.1 side-by-side, then vote on the output you prefer.

Claude Opus 5
✓ Preferred
GPT-4.1
Open in Playground
AI Model Comparison Table
Feature
Anthropic
Claude Opus 5
OpenAI
GPT-4.1

FAQ

Common questions about Claude Opus 5 vs GPT-4.1.

Which is better, Claude Opus 5 or GPT-4.1?

Claude Opus 5 significantly outperforms across most benchmarks. Claude Opus 5 is made by Anthropic and GPT-4.1 is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude Opus 5 compare to GPT-4.1 in benchmarks?

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%. GPT-4.1 scores MMLU: 90.2%, CharXiv-D: 87.9%, IFEval: 87.4%, MMMLU: 87.3%, MMMU: 74.8%.

Is Claude Opus 5 cheaper than GPT-4.1?

GPT-4.1 is 2.5x cheaper for input tokens. Claude Opus 5 costs $5.00/M input and $25.00/M output via anthropic. GPT-4.1 costs $2.00/M input and $8.00/M output via openai.

What are the context window sizes for Claude Opus 5 and GPT-4.1?

Claude Opus 5 supports 1.0M tokens and GPT-4.1 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 5 and GPT-4.1?

Key differences include context window (1.0M vs 1.0M), input pricing ($5.00 vs $2.00/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Opus 5 and GPT-4.1?

Claude Opus 5 is developed by Anthropic and GPT-4.1 is developed by OpenAI.

Related comparisons