AI API Cost Calculator
Calculate exact monthly costs for GPT-5.4, Claude Opus 4.6, Gemini 2.5 Pro, and other AI APIs. Enter your usage patterns and see real-time cost projections.
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Cost Projection
AI API Pricing Comparison 2026
GPT-5.4 pricing reflects standard rates for typical context sizes. Gemini 2.5 Pro pricing reflects the ≤200k prompt tier — higher rates apply above 200k tokens. Last verified: 2026-04-01.
| Model | Provider | Input /1M tokens | Output /1M tokens | Context | Best For |
|---|---|---|---|---|---|
| GPT-5.4 | OpenAI | $2.5 | $15 | 1M | Complex reasoning, coding, hard tasks |
| GPT-5.4-mini | OpenAI | $0.75 | $4.5 | 128K | Balanced cost/quality at scale |
| GPT-5.4-nano | OpenAI | $0.2 | $1.25 | 128K | Ultra-high volume, simple tasks |
| Claude Opus 4.6 | Anthropic | $5 | $25 | 1M | Most powerful, complex analysis |
| Claude Sonnet 4.6 | Anthropic | $3 | $15 | 1M | Coding, long docs, instruction-following |
| Claude Haiku 4.5 | Anthropic | $1 | $5 | 200K | Fast, cost-effective tasks |
| Gemini 2.5 Pro | $1.25 | $10 | 1M | Complex tasks, massive context, multimodal (≤200k prompt tier) | |
| Gemini 2.5 Flash | $0.3 | $2.5 | 1M | High-volume, multimodal tasks | |
| Gemini 2.5 Flash-Lite | $0.1 | $0.4 | 1M | Cheapest capable model, max volume | |
| Mistral Large 3 | Mistral AI | $0.5 | $1.5 | 256K | EU compliance, multilingual, open-weight |
| Mistral Small 3.2 | Mistral AI | $0.1 | $0.3 | 128K | Open weights, efficient deployment |
Frequently Asked Questions
Which AI API is cheapest?
Mistral Small 3.2 ($0.10/1M input) and Gemini 2.5 Flash-Lite ($0.10/1M input, $0.40/1M output) are currently the cheapest capable production models. GPT-5.4 nano at $0.20/1M is also very cost-effective for high-volume applications.
How do I reduce AI API costs?
Key strategies: (1) Cache repeated requests, (2) Compress prompts to reduce input tokens, (3) Use faster/cheaper models for simple tasks and only route complex requests to flagship models, (4) Implement request batching, (5) Use prompt caching features offered by Anthropic and OpenAI.
What is a token in AI APIs?
A token is roughly 4 characters or 0.75 words in English. 1,000 tokens ≈ 750 words. A typical paragraph is 100-200 tokens. The word "calculator" is about 2-3 tokens.