Claude Opus 4.6 vs GPT-4.5 Comparison

Comparing Claude Opus 4.6 and GPT-4.5 across benchmarks, pricing, and capabilities.

Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

4 benchmarks

Claude Opus 4.6 outperforms in 4 benchmarks (CharXiv-R, GPQA, MMMLU, SWE-Bench Verified), while GPT-4.5 is better at 0 benchmarks.

Claude Opus 4.6 significantly outperforms across most benchmarks.

Sat Mar 14 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Claude Opus 4.6 costs less

For input processing, Claude Opus 4.6 ($5.00/1M tokens) is 15.0x cheaper than GPT-4.5 ($75.00/1M tokens).

For output processing, Claude Opus 4.6 ($25.00/1M tokens) is 6.0x cheaper than GPT-4.5 ($150.00/1M tokens).

In conclusion, GPT-4.5 is more expensive than Claude Opus 4.6.*

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

Lowest available price from all providers

Sat Mar 14 2026 • llm-stats.com

Claude Opus 4.6

Input tokens$5.00

Output tokens$25.00

Best providerAnthropic

GPT-4.5

Input tokens$75.00

Output tokens$150.00

Best providerOpenAI

Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Claude Opus 4.6 accepts 200,000 input tokens compared to GPT-4.5's 128,000 tokens. Claude Opus 4.6 can generate longer responses up to 128,000 tokens, while GPT-4.5 is limited to 4,096 tokens.

Claude Opus 4.6

Input200,000 tokens

Output128,000 tokens

GPT-4.5

Input128,000 tokens

Output4,096 tokens

Sat Mar 14 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Opus 4.6 and GPT-4.5 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-4.5

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 4.6

Proprietary

Closed source

GPT-4.5

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Opus 4.6 was released on 2026-02-05, while GPT-4.5 was released on 2025-02-27.

Claude Opus 4.6 is 11 months newer than GPT-4.5.

Claude Opus 4.6

Feb 5, 2026

1 months ago

11mo newer

GPT-4.5

Feb 27, 2025

1.0 years ago

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 4.6 is available from Anthropic. GPT-4.5 is available from OpenAI. The availability of providers can affect quality of the model and reliability.