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GPT-5.4 mini vs GPT-4o mini — OpenAI Budget Showdown

GPT-4o mini is 80% cheaper on input and 87% cheaper on output. But GPT-5.4 mini has 3x more context at 400K tokens. Which OpenAI budget model should you pick?

Pricing data verified: Jul 4, 2026

Cheapest Input
GPT-4o mini
$0.15 vs $0.75 per 1M tokens
Best Context
GPT-5.4 mini
400K vs 128K tokens
Best Value
GPT-4o mini
80% cheaper input, 87% cheaper output

All Budget Models Compared

Budget-tier AI models from major providers, ranked by input price.

Model Provider Tier Input (per 1M) Output (per 1M) Context
GPT-oss 20B OpenAI Budget $0.08 $0.35 128K
Gemini 2.5 Flash-Lite Google Budget $0.10 $0.40 1M
Mistral Small 4 Mistral Budget $0.10 $0.30 128K
DeepSeek V4 Flash DeepSeek Budget $0.14 $0.28 1M
GPT-4o mini OpenAI Budget $0.15 $0.60 128K
GPT-5.4 nano OpenAI Budget $0.20 $1.25 400K
Llama 4 Maverick Meta Budget $0.27 $0.85 1M
DeepSeek V4 Pro DeepSeek Budget $0.435 $0.87 1M
GPT-5.4 mini OpenAI Budget $0.75 $4.50 400K

Calculate Your Exact Costs

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Which Should You Choose?

Chatbot / Customer Support

High volume, short responses. Cost per message matters most. Both models handle conversational AI well.

Pick GPT-4o mini: 80% cheaper on input ($0.15 vs $0.75), handles most customer queries well. At 1M requests/month: massive savings.

Code Generation

Complex reasoning, longer outputs. Quality and accuracy matter. Both handle coding tasks well.

Pick GPT-4o mini: Excellent for code generation at 80% cheaper input. Handles code completion and generation at a fraction of the cost.

Long Document Analysis

Processing large documents, legal contracts, or codebases. Context window is critical.

Pick GPT-5.4 mini: 400K context (3x more than GPT-4o mini's 128K). Essential for large-scale document analysis that requires extended context.

High-Volume Data Processing

Processing large datasets, extracting structured data, or running batch operations at scale.

Pick GPT-4o mini: At $0.15/$0.60, it's one of the cheapest OpenAI models available. Best value for high-volume batch processing.

Advanced Reasoning

Complex multi-step reasoning, math, logic, and analysis tasks that push model capabilities.

Pick GPT-5.4 mini: Improved reasoning capabilities over GPT-4o mini. Worth the premium for tasks that require advanced analytical thinking.

Structured Output

JSON mode, function calling, and structured data extraction. Both handle this well.

Either works: Both models handle JSON and structured output well. GPT-4o mini is 80% cheaper, so prefer it unless you need extended context.

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Frequently Asked Questions

Is GPT-4o mini cheaper than GPT-5.4 mini?

Yes, GPT-4o mini is significantly cheaper. It costs $0.15/$0.60 per 1M tokens while GPT-5.4 mini costs $0.75/$4.50. That's 80% cheaper on input and 87% cheaper on output. At 1M tokens/month, GPT-4o mini costs $0.75 vs GPT-5.4 mini's $5.25 — saving $4.50/month.

How much can I save switching from GPT-5.4 mini to GPT-4o mini?

You can save up to 85%+ on your AI API costs by switching to GPT-4o mini. Input tokens are 80% cheaper ($0.15 vs $0.75) and output tokens are 87% cheaper ($0.60 vs $4.50). For a typical workload of 1M input + 500K output tokens per month, you'd save about $4.50/month — that's an 86% reduction.

What does GPT-5.4 mini have that GPT-4o mini doesn't?

GPT-5.4 mini has a 400K token context window vs GPT-4o mini's 128K — that's 3x more context. GPT-5.4 mini also has improved reasoning capabilities and better performance on complex tasks. However, GPT-4o mini is 80-87% cheaper, making it the better choice for most standard workloads.

Is GPT-4o mini still supported by OpenAI?

Yes, GPT-4o mini is still fully supported by OpenAI and available through their API. It remains one of the most popular budget models due to its low cost and reliable performance. It's a great choice for cost-sensitive production workloads.

Which is better for a chatbot: GPT-5.4 mini or GPT-4o mini?

For most chatbot use cases, GPT-4o mini is the better choice. It's 80% cheaper on input and 87% cheaper on output, and chatbots rarely need the 400K context window. GPT-4o mini handles conversational AI, customer support, and FAQ-style queries well. Choose GPT-5.4 mini only if you need extended context or superior reasoning.

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