Is GPT-4o mini cheaper than DeepSeek V3?

On input tokens, GPT-4o mini is cheaper ($0.15 vs $0.28 per million). On output tokens, DeepSeek V3 is cheaper. Total cost on a typical workload depends on your input:output ratio.

Which has the larger context window, GPT-4o mini or DeepSeek V3?

DeepSeek V3 has a 128,000-token context window. GPT-4o mini fits 128,000 tokens.

How do I switch from GPT-4o mini to DeepSeek V3?

Update the model id in your API call: replace "gpt-4o-mini" with "deepseek-v3". Then verify cost impact on a sample of your real prompts using a token counter.

GPT-4o mini vs DeepSeek V3

Side-by-side comparison of GPT-4o mini (OpenAI) and DeepSeek V3 (DeepSeek). Exact API pricing per million tokens, context windows, output speed, and total cost on real-world prompts.

Specifications

Spec	GPT-4o mini	DeepSeek V3
Provider	OpenAI	DeepSeek
Model id	gpt-4o-mini	deepseek-v3
Input price (per 1M tokens)	$0.15	$0.28
Output price (per 1M tokens)	$0.60	$0.42
Context window	128,000	128,000
Output speed (tokens/sec)	~130	~60

Cost on real prompts

Total cost = (input tokens × input price) + (output tokens × output price). Numbers below use the exact pricing tables published by each provider.

Scenario	Input	Output	GPT-4o mini	DeepSeek V3	Cheaper
Short question + answer	50	150	$0.000097	$0.000077	DeepSeek V3
Code review on one file	500	1,500	$0.000975	$0.00077	DeepSeek V3
Long document summary	5,000	500	$0.001050	$0.001610	GPT-4o mini
Heavy reasoning task	2,000	8,000	$0.005100	$0.003920	DeepSeek V3
Full codebase analysis	50,000	10,000	$0.013500	$0.018200	GPT-4o mini

Want the exact cost for your prompt instead of these examples? Open the cost calculator pre-loaded with both models →

When to pick which

Heuristics derived from the spec table above. Always validate on your own prompts before committing — these are starting points, not verdicts.

Pick GPT-4o mini for

•input-heavy workloads (long context, RAG, document QA) — gpt-4o-mini is cheaper per input token
•latency-sensitive UX (chat, autocompletion) — gpt-4o-mini streams faster (~130 vs ~60 tok/s)

Pick DeepSeek V3 for

•output-heavy workloads — deepseek-v3 is meaningfully cheaper per output token

Switching between them

For most use cases, switching providers means updating the model id and the request shape if the providers differ. Within the same provider, it's usually a single-line change.

From GPT-4o mini to DeepSeek V3

# Before
model = "gpt-4o-mini"

# After
model = "deepseek-v3"

If the providers differ (OpenAI vs DeepSeek), you'll also need to swap the SDK / endpoint URL. Cross-provider migrations usually take 30 minutes to a few hours depending on how many features (streaming, function calling, tool use) you depend on.

Calculate cost on your own prompt

The examples above use generic input/output ratios. For an exact comparison, paste your real prompt into the calculator — it counts tokens with the right tokenizer for each model and shows side-by-side cost.

Open the calculator with both models →