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GPT-5 Mini vs Haiku 4.5
OpenAI's cheapest model vs Anthropic's budget option. GPT-5 Mini is 75% cheaper on input and 60% cheaper on output — the ultimate budget showdown.
Pricing data verified: Jun 29, 2026
| Specification | GPT-5 Mini (OpenAI) | Haiku 4.5 (Anthropic) |
|---|---|---|
| Input Price (per 1M tokens) | $0.25 | $1.00 |
| Output Price (per 1M tokens) | $2.00 | $5.00 |
| Context Window | 272K tokens | 272K tokens |
| Tier | Budget | Budget |
| Provider | OpenAI | Anthropic |
Calculate Your Exact Costs
Budget vs budget — GPT-5 Mini undercuts Haiku 4.5 on every token. See the real savings for your workload.
Which Model for Which Use Case?
Chatbots & Virtual Assistants
High-volume conversational interfaces. GPT-5 Mini's 75% cheaper input pricing makes it the clear winner for chat applications where cost per message matters most.
Safety-Critical Applications
Content moderation, sensitive data handling, compliance-heavy workloads. Anthropic's Constitutional AI approach provides additional safety guarantees that may be worth the premium.
Content Generation
Blog posts, marketing copy, product descriptions. GPT-5 Mini's budget pricing handles high-volume output at 60% lower cost per token. Good enough quality for most content needs.
Enterprise Integration
Large-scale enterprise deployments. Both offer 272K context. Haiku 4.5's Anthropic ecosystem may integrate better if you're already using Claude models elsewhere in your stack.
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Frequently Asked Questions
How much cheaper is GPT-5 Mini than Haiku 4.5?
GPT-5 Mini costs $0.25/$2.00 per 1M tokens. Haiku 4.5 costs $1.00/$5.00 per 1M tokens. GPT-5 Mini is 75% cheaper on input and 60% cheaper on output — a 64% overall savings for most workloads.
Which has a larger context window?
Both models have a 272K token context window. This is a tie — neither model offers an advantage for long-context workloads.
When should I choose GPT-5 Mini over Haiku 4.5?
Choose GPT-5 Mini when cost is your primary concern — it's 75% cheaper on input tokens, making it ideal for high-volume, input-heavy workloads. Choose Haiku 4.5 when you need Anthropic's safety guarantees or prefer the Anthropic ecosystem.
Is GPT-5 Mini better than Haiku 4.5 for coding?
Both are capable coding assistants at budget prices. GPT-5 Mini tends to perform well on standard coding tasks, while Haiku 4.5 benefits from Anthropic's training approach. At 60-75% lower cost, GPT-5 Mini is the better value for high-volume code generation.
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