GPT-4.1 Nano vs Claude Haiku 4.5 — LLM API Cost Comparison
Compare GPT-4.1 Nano (OpenAI) vs Claude Haiku 4.5 (Anthropic) on cost per million tokens, context window, and monthly spend.
Prices verified 2026-05-20 · Pricing may change — use the calculator for current estimates
- Input
- $0.1/1M tokens
- Output
- $0.4/1M tokens
- Context
- 1M tokens
- Released
- 2025-04
Cheapest capable OpenAI model; classification & routing
- Input
- $1/1M tokens
- Output
- $5/1M tokens
- Context
- 200K tokens
- Released
- 2025-10
Fastest Anthropic model; near-frontier intelligence
Monthly Cost by Usage Tier (70% input / 30% output ratio)
| Usage | GPT-4.1 Nano | Claude Haiku 4.5 | Cheaper by |
|---|---|---|---|
| Light (1M tokens) | $0.190 | $2.20 | GPT-4.1 Nano (91%) |
| Moderate (10M tokens) | $1.90 | $22.00 | GPT-4.1 Nano (91%) |
| Heavy (100M tokens) | $19.00 | $220 | GPT-4.1 Nano (91%) |
| Very Heavy (1B tokens) | $190 | $2,200 | GPT-4.1 Nano (91%) |
Frequently Asked Questions
Which is cheaper — GPT-4.1 Nano or Claude Haiku 4.5?
For input tokens, GPT-4.1 Nano is cheaper at $0.1/1M tokens — 10.0× less than $1/1M. For output tokens, GPT-4.1 Nano wins at $0.4/1M vs $5/1M. At heavy workloads (100M tokens/month), the cost difference can be significant.
What is the context window difference between GPT-4.1 Nano and Claude Haiku 4.5?
GPT-4.1 Nano supports 1,000,000 tokens per request; Claude Haiku 4.5 supports 200,000 tokens. GPT-4.1 Nano wins on context length, making it better for long documents, large codebases, or extended conversations without chunking.
When should I choose GPT-4.1 Nano over Claude Haiku 4.5?
Choose GPT-4.1 Nano (OpenAI) if you prefer OpenAI's ecosystem, tooling, or reliability track record. Cheapest capable OpenAI model; classification & routing. Choose Claude Haiku 4.5 (Anthropic) if Fastest Anthropic model; near-frontier intelligence. the price/performance fits your workload better. Use this calculator to find the break-even point for your exact token volume.
How much does 1 billion tokens cost on GPT-4.1 Nano vs Claude Haiku 4.5?
At 700M input + 300M output tokens (1B total): GPT-4.1 Nano costs $190; Claude Haiku 4.5 costs $2200. The difference is $2010/billion tokens at this 70/30 input/output ratio.