GPT-5.4 Mini vs Claude Haiku 4.5: Best Budget AI Model

Quick Verdict

GPT-5.4 mini wins this comparison. It scores 60% on coding tasks versus Claude Haiku 4.5's 41%, and it costs 75% less ($0.25/$2 vs $1/$5). The only area where Haiku has an edge is instruction following on nuanced tasks. For most budget AI use cases, GPT-5.4 mini is the better value.

Comparison Table

Feature	GPT-5.4 Mini	Claude Haiku 4.5	Gemini 3 Flash
Coding accuracy	60%	41%	47.6%
API input price	$0.25/1M	$1/1M	$0.50/1M
API output price	$2/1M	$5/1M	$3/1M
Speed	Fast	Fast	Fast
Best for	Coding, general tasks	Instruction following	Balanced budget option

Coding Performance

GPT-5.4 mini's 60% coding accuracy is remarkable for a budget model. That's higher than some frontier models from a year ago. I tested it on common coding tasks like generating API routes, writing unit tests, and refactoring functions. It handled all of them competently, though it occasionally missed edge cases that the full GPT-5.4 would catch. Claude Haiku 4.5 at 41% is usable for simple coding tasks but struggles with anything complex. Gemini 3 Flash at 47.6% falls between the two.

General Tasks

For summarization, Q&A, and basic writing, all three budget models work acceptably. Claude Haiku 4.5 follows instructions more precisely, especially on tasks with multiple constraints. GPT-5.4 mini sometimes takes shortcuts on complex instructions but produces good output on straightforward prompts. Gemini 3 Flash is the most consistent across different task types.

Speed

All three are fast. Budget models are designed for low latency and high throughput. In my testing, response times were under 2 seconds for most queries. If speed is your main requirement, all three deliver.

Cost Analysis

Let's say you process 10 million tokens per month (a realistic volume for a small app). Monthly costs would be:

• GPT-5.4 mini: ~$22.50
• Gemini 3 Flash: ~$35
• Claude Haiku 4.5: ~$60

GPT-5.4 mini is nearly 3x cheaper than Haiku while scoring higher on coding benchmarks. That's a significant difference for budget-conscious developers. There's also GPT-5.4 nano at $0.05/$0.40, which is even cheaper for simple tasks.

When to Use Each

GPT-5.4 mini: Best overall budget model. Use for coding assistance, content generation, data processing, and any task where you need good quality at low cost.

Claude Haiku 4.5: Use when precise instruction following matters more than raw capability. Good for structured data extraction and tasks with strict output formats.

Gemini 3 Flash: Use as a balanced middle ground, or when you're already in the Google ecosystem.

Or Use All Three

Admix gives you access to all budget models plus their premium counterparts. The Free plan includes 20 free credits per day. Starter ($10/month, or $8/month billed annually) gives you 500 credits per month. You can route simple tasks to budget models and complex ones to frontier models, getting the best quality-to-cost ratio.

FAQ

Is GPT-5.4 mini good enough for production use?

For many use cases, yes. Its 60% coding accuracy and low price make it viable for chatbots, content generation, and data processing. For anything mission-critical, you should still use a frontier model.

Why is Claude Haiku 4.5 so much more expensive?

Anthropic's pricing across all tiers is higher than OpenAI's. Haiku is their budget model, but at $1/$5, it's priced closer to mid-tier models from other providers.

What about DeepSeek V4?

DeepSeek V4 with ~1T parameters matches frontier coding performance and is competitively priced. It's worth considering if you're comfortable with a Chinese AI provider. You can access it through Admix alongside all other major models.