Frontier · ≥50
≈ GPT-5.5 / Opus-class
100.00
0.00%
Champion
Gemini-3.5 Flash
- Blended
- $3.3750/1M
- Capability
- 50
- Qualifiers
- 5
IFX — the benchmark for AI inference costs
IFX Advisor
Find the right AI model.
Live cost data across the leading models, blended into one daily index. Describe your task — the advisor picks the cheapest model that clears the bar.
Cost of Intelligence
Cheapest model meeting each capability bar
Each bar tracks the cheapest blended $/1M-token model whose capability score meets the gate. Base 100 at inception — falling means it is getting cheaper to buy that level of capability.
Scale aa-intelligence-index-v4.1 · base 100 on 2026-06-18
Capable · ≥40
≈ DeepSeek V4 Pro-class
100.00
0.00%
Champion
GPT-5.4 Mini
- Blended
- $1.6875/1M
- Capability
- 40
- Qualifiers
- 10
Budget · ≥25
≈ GPT-4-class
100.00
0.00%
Champion
GPT-5.4 Nano
- Blended
- $0.4625/1M
- Capability
- 38
- Qualifiers
- 20
This Week in Inference Pricing
IFX unchanged at 80.69
The Inference Index closed at 80.69 on June 21, 2026, unchanged from the previous reading. The basket tracks 297 models across leading providers, blended at a 3:1 input-to-output token mix.
Per-1M-token prices in the basket today range from $-1000000.00 (lowest blended) to $262.50 (highest blended), with a weighted average of $-10097.03 across the basket.
The index is normalized to 100 at inception (2024-04-01), so today's value reads as a percentage of basket cost versus the inception date.
Top movers
No 30-day price changes yet — movers will appear once history accrues.