HomeModel ComparisonsGPT-5.5 vs DeepSeek-V4-Pro

GPT-5.5vsDeepSeek-V4-Pro

Which model is more cost-effective? Compare pricing, context window limits, and run live calculations below.

0 Tokens
Expected Output TokensEstimate generation cost

GPT-5.5

OpenAI • 256,000 Context
Input (per 1M)
$5
Output (per 1M)
$30
Est. Total Cost$0.0000

DeepSeek-V4-Pro

DeepSeek • 1,000,000 Context
Input (per 1M)
$0.435
Output (per 1M)
$0.87
Est. Total Cost$0.0000

In-Depth Comparison: GPT-5.5 vs DeepSeek-V4-Pro

When choosing between GPT-5.5 (by OpenAI) and DeepSeek-V4-Pro (by DeepSeek), developers must weigh API pricing and context window limits.

GPT-5.5 offers a context window of 256,000 tokens at an input cost of $5 per 1M tokens. On the other hand, DeepSeek-V4-Pro provides a 1,000,000 token context window, priced at $0.435 per 1M input tokens. This helps developers find the best balance between performance and budget.

Frequently Asked Questions

Which is cheaper: GPT-5.5 or DeepSeek-V4-Pro?
GPT-5.5 charges $5 per 1M input tokens, whereas DeepSeek-V4-Pro charges $0.435. For output, GPT-5.5 is $30 vs $0.87 for DeepSeek-V4-Pro.
What is the context window difference between GPT-5.5 and DeepSeek-V4-Pro?
GPT-5.5 offers a context window of 256,000 tokens. In comparison, DeepSeek-V4-Pro supports up to 1,000,000 tokens.
Who provides GPT-5.5 and DeepSeek-V4-Pro?
GPT-5.5 is provided by OpenAI, and DeepSeek-V4-Pro is developed by DeepSeek.