Runway

Runway Gen-4.5

Under evaluation
Maker
Runway
Origin
United States
Released
Dec 1, 2025

Strengths & weaknesses

  • Full creative production environment, not just a generation endpoint
  • Strong iteration, editing, and referencing tools for professional workflows
  • Audio still has to be added separately in most pipelines
  • Steeper learning curve than simple prompt-and-generate tools

Evaluation

In assessment · 60% measured

Scored on Runway Gen-4.5 · sources as of Nov 4, 2026

  • Text-to-videow603.9

    Rule B1,225 rating (95% 1,216–1,233) from 48,127 votes · Scale 1,000–1,550, 0 to 10 · LMArena text-to-video arena (runway-gen-4.5) · Sep 22, 2026

  • Image-to-videow40—

    No independent measurement yet

w = weight, each criterion’s share of the overall score. Missing marks don’t count for or against. How scoring works

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Google
7.0/10
  • Realistic motion and prompt adherence with native synchronized audio
  • Strong for cinematic scenes and ambience out of the box
  • Availability and pricing vary by platform and SKU
  • Generation still limited to relatively short clip lengths
OpenAI
Under evaluation
  • Set the early bar for realistic, physically-consistent video generation
  • Strong brand recognition and broad public familiarity
  • OpenAI closed the Sora app in April 2026 and removes the API on September 24, 2026
  • Superseded by newer models from Google, ByteDance, and Kuaishou
Kuaishou
Under evaluation
  • Excellent character motion and dramatic, controllable camera moves
  • Strong image-to-video animation from a single source frame
  • Frame preservation needs careful checking on longer generations
  • Native audio exists but is often disabled in third-party integrations
ByteDance
  • Multishot generation with longer, planned sequences
  • Upstream audio generation capability built into the model
  • Native audio is often disabled in third-party API routes
  • Smaller footprint outside ByteDance's own ecosystem