Model Comparison

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

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

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

Claude Opus 5 (by Anthropic) and GPT-5 (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 2 benchmarks (BrowseComp, Humanity's Last Exam), while GPT-5 is better at 0 benchmarks. Claude Opus 5 significantly outperforms across most benchmarks.

On price, GPT-5 is roughly 2.9x 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.

Choose Claude Opus 5 if…

  • you want the strongest raw capability — it leads on 2 of 2 shared benchmarks
  • you process long inputs — it offers a 1,000,000 token context window
  • you want the most recent training data — it shipped Jul 2026

Choose GPT-5 if…

  • cost matters — it's about 2.9x cheaper per token

Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

Claude Opus 5 outperforms in 2 benchmarks (BrowseComp, Humanity's Last Exam), while GPT-5 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-5 costs less

For input processing, Claude Opus 5 ($5.00/1M tokens) is 4.0x more expensive than GPT-5 ($1.25/1M tokens).

For output processing, Claude Opus 5 ($25.00/1M tokens) is 2.5x more expensive than GPT-5 ($10.00/1M tokens).

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

* 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-5
Input tokens$1.25
Output tokens$10.00
Best providerOpenAI
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 GPT-5's 400,000 tokens. Both models can generate responses up to 128,000 tokens.

Anthropic
Claude Opus 5
Input1,000,000 tokens
Output128,000 tokens
OpenAI
GPT-5
Input400,000 tokens
Output128,000 tokens
Sun Jul 26 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Opus 5 and GPT-5 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-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 5

Proprietary

Closed source

GPT-5

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Opus 5 was released on 2026-07-24, while GPT-5 was released on 2025-08-07.

Claude Opus 5 is 12 months newer than GPT-5.

Claude Opus 5

Jul 24, 2026

1 days ago

11mo newer
GPT-5

Aug 7, 2025

11 months ago

Knowledge Cutoff

When training data ends

GPT-5 has a documented knowledge cutoff of 2024-09-30, while Claude Opus 5's cutoff date is not specified.

We can confirm GPT-5's training data extends to 2024-09-30, but cannot make a direct comparison without Claude Opus 5's cutoff date.

Claude Opus 5

—

GPT-5

Sep 2024

Provider Availability

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

Claude Opus 5

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

GPT-5

openai logo
OpenAI
Input Price:Input: $1.25/1MOutput Price:Output: $10.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Anthropic
Larger context window (1,000,000 tokens)
Higher BrowseComp score (90.8% vs 54.9%)
Higher Humanity's Last Exam score (64.7% vs 24.8%)
OpenAI
Less expensive input tokens
Less expensive output tokens

Detailed Comparison

Interactive Arena

Judge for yourself.

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

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

FAQ

Common questions about Claude Opus 5 vs GPT-5.

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

Claude Opus 5 significantly outperforms across most benchmarks. Claude Opus 5 is made by Anthropic and GPT-5 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-5 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-5 scores SWE-Lancer (IC-Diamond subset): 100.0%, COLLIE: 99.0%, Tau2 Telecom: 96.7%, OpenAI-MRCR: 2 needle 128k: 95.2%, AIME 2025: 94.6%.

Is Claude Opus 5 cheaper than GPT-5?

GPT-5 is 4.0x cheaper for input tokens. Claude Opus 5 costs $5.00/M input and $25.00/M output via anthropic. GPT-5 costs $1.25/M input and $10.00/M output via openai.

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

Claude Opus 5 supports 1.0M tokens and GPT-5 supports 400K 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-5?

Key differences include context window (1.0M vs 400K), input pricing ($5.00 vs $1.25/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Opus 5 and GPT-5?

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

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