2026 Audit Report

GPT-5.2 Pro vs Gemini 3 Ultra

Is GPT-5.2 Pro worth the premium? Our automated audit reveals a 76% cost difference in production environments.

Last updated: Oct 24, 2026Sources: AxiomGrid Model Wiki · Provider pricing pagesQuality: HIGH

Axiom Verdict

"Major efficiency gain. Switching from GPT-5.2 Pro to Gemini 3 Ultra cuts costs by half (76%). Recommended for high-volume batch processing."

Key Metrics

Axiom Snapshot
MetricGPT-5.2 ProGemini 3 Ultra
Input / 1M¥151.20¥36.00
Output / 1M¥1,209.60¥180.00
Cache Read-¥18.00
Context Window512K2M
Max Output16K8K
MultimodalYesYes
LatencyTBDTBD
Best FitArbitrationVideo Analysis

Action Plan

  • Migrate high-volume workloads to Gemini 3 Ultra for immediate cost relief.
  • Keep GPT-5.2 Pro only for edge-case arbitration and premium reasoning.
  • Set a weekly cost audit to prevent pricing drift.

Methodology

  • Pricing is normalized to cost per 1M input/output tokens for direct comparison.
  • Arbitrage gap compares current input pricing against the higher-priced model.
  • Quality tier reflects pricing completeness, context window, and use-case coverage.

Pricing Matrix

MetricGPT-5.2 ProGemini 3 Ultra
Input / 1M¥151.20¥36.00
Output / 1M¥1,209.60¥180.00
Cache Read¥0.00¥18.00

Use Case Analysis

GPT-5.2 Pro Wins
  • Arbitration
Gemini 3 Ultra Wins
  • Video Analysis

FAQ

Which model is cheaper: GPT-5.2 Pro or Gemini 3 Ultra?
Gemini 3 Ultra shows a 76% cost advantage based on current input pricing.
When should I choose GPT-5.2 Pro?
GPT-5.2 Pro is best for Arbitration.
How does the context window compare?
GPT-5.2 Pro supports 512K context vs Gemini 3 Ultra at 2M.
Which model is better for high-volume routing?
Gemini 3 Ultra is the recommended L1/L2 router for cost efficiency.
Do cache discounts materially change costs?
Yes. Cache pricing can shift effective input costs by 10-90% depending on hit rate.
How often is this comparison updated?
This audit refreshes as model pricing changes. Last updated Oct 24, 2026.

Performance Radar

GPT-5.2 Pro
Gemini 3 Ultra

Cost Scaling (Monthly)

GPT-5.2 Pro vs Gemini 3 Ultra: 2026 Cost Audit | AxiomGrid