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TokenAtlas

OpenAI GPT-4 Pricing

The GPT-4 family spans three live SKUs with a 60× price spread between the cheapest and most expensive variants. Choosing the right tier is the single biggest cost lever in any OpenAI workload.

Current per-token rates

GPT-4o: $2.50/1M input, $10/1M output. GPT-4 Turbo: $10/$30. GPT-4o-mini: $0.15/$0.60. All rates billed per token, no minimums.

Cached input pricing

GPT-4o cached input is billed at 50% of standard ($1.25/1M). Cache hits trigger automatically on identical prefixes ≥1024 tokens.

Batch API discount

Async jobs submitted via Batch API run at 50% off both input and output. Completes within 24h. Ideal for evals, embeddings backfills, and bulk summarization.

Worked cost example

A support agent: 4K tokens in, 600 out per call, 100K calls/month. GPT-4o ≈ $1,600. GPT-4o-mini ≈ $96. Tier choice changes the bill by 16×.

When each tier fits

GPT-4o: reasoning, tool use, accuracy-critical paths. Turbo: legacy compatibility only. Mini: chat, classification, extraction, anything where mini benchmarks within 5% of flagship.

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