HomeModel ComparisonsGPT-5.4 vs DeepSeek-V4-Flash

GPT-5.4vsDeepSeek-V4-Flash

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

0 Tokens
Expected Output TokensEstimate generation cost

GPT-5.4

OpenAI • 128,000 Context
Input (per 1M)
$2.5
Output (per 1M)
$15
Est. Total Cost$0.0000

DeepSeek-V4-Flash

DeepSeek • 1,000,000 Context
Input (per 1M)
$0.14
Output (per 1M)
$0.28
Est. Total Cost$0.0000

In-Depth Comparison: GPT-5.4 vs DeepSeek-V4-Flash

When choosing between GPT-5.4 (by OpenAI) and DeepSeek-V4-Flash (by DeepSeek), developers must weigh API pricing and context window limits.

GPT-5.4 offers a context window of 128,000 tokens at an input cost of $2.5 per 1M tokens. On the other hand, DeepSeek-V4-Flash provides a 1,000,000 token context window, priced at $0.14 per 1M input tokens. This helps developers find the best balance between performance and budget.

Frequently Asked Questions

Which is cheaper: GPT-5.4 or DeepSeek-V4-Flash?
GPT-5.4 charges $2.5 per 1M input tokens, whereas DeepSeek-V4-Flash charges $0.14. For output, GPT-5.4 is $15 vs $0.28 for DeepSeek-V4-Flash.
What is the context window difference between GPT-5.4 and DeepSeek-V4-Flash?
GPT-5.4 offers a context window of 128,000 tokens. In comparison, DeepSeek-V4-Flash supports up to 1,000,000 tokens.
Who provides GPT-5.4 and DeepSeek-V4-Flash?
GPT-5.4 is provided by OpenAI, and DeepSeek-V4-Flash is developed by DeepSeek.