Standard Compute
Model comparison 2026

DeepSeek V4 Flash vs GPT-5.4

DeepSeek V4 Flash
DeepSeek · Budget · Open weights
$0.12/1M · 1.0M ctx
GPT-5.4
OpenAI · Balanced · Proprietary
$6.25/1M · 1.1M ctx

Community vote

Pick a winner in each dimension. You can change your vote any time.

Output Quality

Correctness and depth of what it produces

Agentic Ability

Tool calls, instruction-following, and multi-step tasks

Speed

Tokens per second and time-to-first-token

Value for Money

How much capability you get per dollar

Reliability

Consistent results: fewer refusals, loops and format breaks

Specs and pricing side by side

Spec
DeepSeek V4 Flash
GPT-5.4
Maker
DeepSeek
OpenAI
Blended price / 1M
$0.12
$6.25
Input / output
$0.09 in · $0.18 out / 1M tokens
$2.50 in · $15 out / 1M tokens
Context window
1.0M
1.1M
Open weights
Yes
No
Tool use
Yes
Yes
Reasoning
Yes
Yes
Output Quality
7.7
7.7
Agentic Ability
7.1
6.2
Speed
9.1
7.6
Value for Money
9.4
4.6
Reliability
8.7
8.6

Pricing and capabilities synced from the OpenRouter catalogue. Scores are editorial (0–10).

Verdict: DeepSeek V4 Flash or GPT-5.4?

Updated 2026-10-17

Choose DeepSeek V4 Flash if you want existing setups that still call the deepseek-v4-flash name. Choose GPT-5.4 if you want existing GPT-5.4 setups that have not moved to the GPT-6 family.

In our editorial scoring, DeepSeek V4 Flash leads in 4 of five dimensions (agentic ability, speed, value for money and reliability), while GPT-5.4 leads in 0. On price, DeepSeek V4 Flash runs about $0.12 per 1M tokens (blended) and is open-weight; GPT-5.4 is about $6.25 and proprietary.

Where DeepSeek V4 Flash falls short
  • Retired as a DeepSeek API name; calls run V4.1 Flash instead
  • Third-party hosts of the original weights vary in price and speed
Full DeepSeek V4 Flash breakdown →
Where GPT-5.4 falls short
  • Superseded by the GPT-6 family; GPT-6.1 Sol scores higher for less
  • Prompts over 272K tokens bill at higher rates
Full GPT-5.4 breakdown →

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