2026 Audit Report

Runway Gen-4 vs HeyGen v4

Is Runway Gen-4 worth the premium? Our automated audit reveals a 63% cost difference in production environments.

Last updated: Sep 23, 2026Sources: AxiomGrid Model Wiki · Provider pricing pagesQuality: MEDIUM

Axiom Verdict

"Major efficiency gain. Switching from HeyGen v4 to Runway Gen-4 cuts costs by half (63%). Recommended for high-volume batch processing."

Key Metrics

Axiom Snapshot
MetricRunway Gen-4HeyGen v4
Input / 1M¥324.00¥864.00
Output / 1M¥0.00¥0.00
Cache Read--
Context WindowN/AN/A
Max Output1 MinN/A
MultimodalYesYes
LatencyTBDTBD
Best FitAdsAvatars

Action Plan

  • Migrate high-volume workloads to HeyGen v4 for immediate cost relief.
  • Keep Runway Gen-4 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

MetricRunway Gen-4HeyGen v4
Input / 1M¥324.00¥864.00
Output / 1M¥0.00¥0.00
Cache Read¥0.00¥0.00

Use Case Analysis

Runway Gen-4 Wins
  • Ads
HeyGen v4 Wins
  • Avatars

FAQ

Which model is cheaper: Runway Gen-4 or HeyGen v4?
HeyGen v4 shows a 63% cost advantage based on current input pricing.
When should I choose Runway Gen-4?
Runway Gen-4 is best for Ads.
How does the context window compare?
Runway Gen-4 supports N/A context vs HeyGen v4 at N/A.
Which model is better for high-volume routing?
HeyGen v4 is the recommended L1/L2 router for cost efficiency.
Do cache discounts materially change costs?
Cache pricing is not published for at least one model; treat cache savings as unknown.
How often is this comparison updated?
This audit refreshes as model pricing changes. Last updated Sep 23, 2026.

Performance Radar

Runway Gen-4
HeyGen v4

Cost Scaling (Monthly)

Runway Gen-4 vs HeyGen v4: 2026 Cost Audit | AxiomGrid