Claude Haiku 4.5 vs GPT-5 nano
Claude Haiku 4.5 vs GPT-5 nano: GPT-5 nano is cheaper for input-heavy usage ($0.05/M vs $1.00/M input tokens), while Claude Haiku 4.5 is better for long-context tasks (200,000 tokens).
Direct answer: choose GPT-5 nano for lower token spend and choose Claude Haiku 4.5 when your workload needs longer context.
Compare input and output token pricing, context windows, and monthly cost estimates on one page so you can pick the cheaper model fast.
Cost Comparison (1000 input + 500 output tokens, 100 requests/day)
Claude Haiku 4.5
GPT-5 nano
Cost Differences
GPT-5 nano costs less than Claude Haiku 4.5
Quick Recommendation
Winner for direct API pricing: GPT-5 nano. At the default workload, GPT-5 nano saves about $9.75/month ($118.625/year) versus Claude Haiku 4.5.
Feature Comparison
| Feature | Claude Haiku 4.5 | GPT-5 nano |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Input Price | $1.00/1M tokens | $0.05/1M tokens |
| Output Price | $5.00/1M tokens | $0.40/1M tokens |
| Context Window | 200,000 tokens | 128,000 tokens |
| Max Output | 64,000 tokens | 8,192 tokens |
| Category | efficient | efficient |
| Capabilities | textvision | text |
| Release Date | 10/15/2025 | 8/7/2025 |
Claude Haiku 4.5 vs GPT-5 nano: Which Should You Choose?
Choosing between Claude Haiku 4.5 and GPT-5 nano depends on your priorities: cost efficiency, context length, or raw capability. GPT-5 nano is the more affordable option at $0.05/1M input tokens — 95% cheaper than Claude Haiku 4.5. Meanwhile, Claude Haiku 4.5 offers a significantly larger context window at 200,000 tokens vs 128,000 for GPT-5 nano.
These models come from different providers — Anthropic and OpenAI — which means different API ecosystems, SDKs, rate limits, and terms of service. If you're already integrated with Anthropic, switching to OpenAIinvolves migration effort beyond just pricing. Factor in your existing infrastructure when deciding.
Both models are in the efficient category, making this a direct head-to-head comparison. At scale — say 10,000 requests per day — the cost difference adds up: GPT-5 nano would save you roughly $975.00/month compared to Claude Haiku 4.5. For startups and indie developers, that difference can be significant.
Output costs matter too. Claude Haiku 4.5 charges $5.00/1M output tokens vs $0.40 for GPT-5 nano. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. GPT-5 nano has the edge here at $0.40/1M output tokens.
Multimodal capabilities: Claude Haiku 4.5 supports vision (image inputs) while GPT-5 nano is text-only. If your application needs image understanding, this narrows your choice.
Best Use Cases
Choose Claude Haiku 4.5 when:
- • You need a larger context window (200,000 tokens)
- • You need more capabilities (vision)
- • You need longer outputs (up to 64,000 tokens)
- • You're already using Anthropic's API ecosystem
- • You're running high-volume, latency-sensitive workloads
Choose GPT-5 nano when:
- • Budget is a primary concern
- • You're already using OpenAI's API ecosystem
- • You're running high-volume, latency-sensitive workloads
Pros and Caveats at a Glance
Claude Haiku 4.5
- • Input pricing: $1.00/M tokens
- • Output pricing: $5.00/M tokens
- • Context window: 200,000 tokens
- • Max output: 64,000 tokens
Watch out for
- • Higher input cost than GPT-5 nano
- • Higher output cost than GPT-5 nano
GPT-5 nano
- • Input pricing: $0.05/M tokens
- • Output pricing: $0.40/M tokens
- • Context window: 128,000 tokens
- • Max output: 8,192 tokens
Watch out for
- • Smaller context window than Claude Haiku 4.5
Try Different Scenarios
Use the calculator below to see how costs change with different usage patterns
Claude Haiku 4.5 (Anthropic)
GPT-5 nano (OpenAI)
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Sign Up for OpenAI →Frequently Asked Questions
Which is cheaper, Claude Haiku 4.5 or GPT-5 nano?▼
What is the context window difference between Claude Haiku 4.5 and GPT-5 nano?▼
Which model is better for AI Chatbot?▼
Which model has better overall pricing for heavy usage?▼
Where can I compare Anthropic and OpenAI API pricing beyond this model matchup?▼
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