Claude Opus 4.8 vs GPT-5.5

How Claude Opus 4.8 (Anthropic) and GPT-5.5 (OpenAI) compare on price and capabilities — and how to use either on anyAInow without a subscription.

Try both on anyAInow See pricing

Claude Opus 4.8

Flagship

GPT-5.5

Flagship

Provider

Anthropic

OpenAI

Best for

Flagship

Reads images

Yes

GPQA Diamond

93.6%

SWE-Bench Verified

88.6%

—

Price

from $40 / 1M

from $50 / 1M

Subscription

None

Benchmark source: llm-stats.com, as of 28 Jun 2026. Higher is better; figures are publisher-reported where not independently verified.

Claude Opus 4.8 or GPT-5.5?

Claude Opus 4.8 and GPT-5.5 both sit in the flagship tier, so they're closely matched for everyday work. Claude Opus 4.8 is the more cost-efficient of the two. On anyAInow you can use either — or run both side by side to see which answers your prompts better — pay-as-you-go with no subscription.

More comparisons

GPT-5.4 vs GPT-5.5 Claude Sonnet 4.6 vs GPT-5.5 Gemini 3.1 Pro vs GPT-5.5 Gemini 2.5 Pro vs GPT-5.5 GPT-5.5 vs Grok 4.3 DeepSeek R1 vs GPT-5.5 GPT-5.5 vs Mistral Large GPT-5.5 vs Llama 4 Maverick

Start chatting

Claude Opus 4.8 GPT-5.5 All models Pricing