Model Comparison

Claude Opus 4.6 vs GPT-5 Medium

Claude Opus 4.6 significantly outperforms across most benchmarks. GPT-5 Medium is 2.9x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

Claude Opus 4.6 outperforms in 2 benchmarks (AIME 2025, GPQA), while GPT-5 Medium is better at 0 benchmarks.

Claude Opus 4.6 significantly outperforms across most benchmarks.

Mon May 18 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT-5 Medium costs less

For input processing, Claude Opus 4.6 ($5.00/1M tokens) is 4.0x more expensive than GPT-5 Medium ($1.25/1M tokens).

For output processing, Claude Opus 4.6 ($25.00/1M tokens) is 2.5x more expensive than GPT-5 Medium ($10.00/1M tokens).

In conclusion, Claude Opus 4.6 is more expensive than GPT-5 Medium.*

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

Lowest available price from all providers
Mon May 18 2026 • llm-stats.com
Anthropic
Claude Opus 4.6
Input tokens$5.00
Output tokens$25.00
Best providerAnthropic
OpenAI
GPT-5 Medium
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 4.6 accepts 1,000,000 input tokens compared to GPT-5 Medium's 400,000 tokens. Both models can generate responses up to 128,000 tokens.

Anthropic
Claude Opus 4.6
Input1,000,000 tokens
Output128,000 tokens
OpenAI
GPT-5 Medium
Input400,000 tokens
Output128,000 tokens
Mon May 18 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Opus 4.6 and GPT-5 Medium support multimodal inputs.

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

Claude Opus 4.6

Text
Images
Audio
Video

GPT-5 Medium

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 4.6

Proprietary

Closed source

GPT-5 Medium

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Opus 4.6 was released on 2026-02-05, while GPT-5 Medium was released on 2025-08-07.

Claude Opus 4.6 is 6 months newer than GPT-5 Medium.

Claude Opus 4.6

Feb 5, 2026

3 months ago

6mo newer
GPT-5 Medium

Aug 7, 2025

9 months ago

Knowledge Cutoff

When training data ends

GPT-5 Medium has a documented knowledge cutoff of 2024-09-30, while Claude Opus 4.6's cutoff date is not specified.

We can confirm GPT-5 Medium's training data extends to 2024-09-30, but cannot make a direct comparison without Claude Opus 4.6's cutoff date.

Claude Opus 4.6

—

GPT-5 Medium

Sep 2024

Provider Availability

Claude Opus 4.6 is available from Anthropic. GPT-5 Medium is available from OpenAI.

Claude Opus 4.6

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

GPT-5 Medium

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

Outputs Comparison

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Key Takeaways

Anthropic
Larger context window (1,000,000 tokens)
Higher AIME 2025 score (99.8% vs 88.9%)
Higher GPQA score (91.3% vs 88.1%)
OpenAI
Less expensive input tokens
Less expensive output tokens

Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude Opus 4.6
OpenAI
GPT-5 Medium

FAQ

Common questions about Claude Opus 4.6 vs GPT-5 Medium.

Which is better, Claude Opus 4.6 or GPT-5 Medium?

Claude Opus 4.6 significantly outperforms across most benchmarks. Claude Opus 4.6 is made by Anthropic and GPT-5 Medium is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude Opus 4.6 compare to GPT-5 Medium in benchmarks?

Claude Opus 4.6 scores Vending-Bench 2: 100.0%, AIME 2025: 99.8%, Tau2 Telecom: 99.3%, Graphwalks parents >128k: 95.4%, MRCR v2 (8-needle): 93.0%. GPT-5 Medium scores AIME 2025: 88.9%, GPQA: 88.1%.

Is Claude Opus 4.6 cheaper than GPT-5 Medium?

GPT-5 Medium is 4.0x cheaper for input tokens. Claude Opus 4.6 costs $5.00/M input and $25.00/M output via anthropic. GPT-5 Medium costs $1.25/M input and $10.00/M output via openai.

What are the context window sizes for Claude Opus 4.6 and GPT-5 Medium?

Claude Opus 4.6 supports 1.0M tokens and GPT-5 Medium 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 4.6 and GPT-5 Medium?

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 4.6 and GPT-5 Medium?

Claude Opus 4.6 is developed by Anthropic and GPT-5 Medium is developed by OpenAI.