Stabilize Sora and Runway AI Video Access With Clash Split Routing in 2026

Why AI video traffic is not “just another AI chat”

If you already followed our ChatGPT and Grok routing article, you know the drill: align DNS, carve out AI hostnames, and pick a healthy node. Video generation adds a different load profile. Browsers and SDKs may open parallel connections to authentication, billing, job status, preview CDNs, and blob storage. A missing rule for one hostname often looks like “the UI loads but the queue never advances” because the spinner and the heavy worker are not the same domain. Throughput matters more than raw ping: a hop that wins small-packet latency tests can still choke on sustained uploads or TLS-heavy bursts.

Runway and Sora-class experiences also differ across surfaces—web, native apps, and partner integrations—so your logs should be the source of truth, not a static list copied from a forum thread. Treat vendor domains as moving targets: update rules when you see new hosts in connection logs, especially after product redesigns or regional CDN shifts.

Dimension	Typical chat AI	Typical AI video
Payload size	Mostly streaming text tokens	Reference frames, masks, audio, and rendered clips
Session shape	Minutes-long SSE streams	Multi-step jobs with polling, retries, and CDN fetches
Failure mode	Mid-answer stalls, verification loops	Queue stuck, upload 0%, API 504/timeout

Name the failure before you tune rules

Observable symptoms point to different fixes. Capture them in plain language so you can compare before/after changes without guessing.

• ERR_CONNECTION_TIMED_OUT on the shell or marketing site: often DNS or a broad GEOIP rule sending the wrong path; fix resolution and policy before swapping nodes.
• Login works but the canvas never initializes: WebGL, telemetry, or feature flags may live on separate hosts; one missing DOMAIN-SUFFIX row can leave a blank stage.
• Queue position frozen or “processing” forever: long polling or WebSocket may hit a different policy than the initial HTML; check logs for hostnames that still read DIRECT or a congested fallback group.
• API timeouts from scripts or CI: SDKs may hit regional endpoints; a node that rotates countries can trigger rate limits or inconsistent TLS paths—prefer a steadier exit for AI_VIDEO groups.

Step 1: DNS, fake-ip, and why video jobs are sensitive

Clash participates in resolution and rule matching. When fake-ip or embedded DNS disagree with what the browser believes, you can see “half-connected” sessions: the marketing shell resolves, but background workers retry forever. That feels like a broken product when it is a routing layer mismatch. Start with the same DNS hygiene we recommend elsewhere: read the DNS and fake-ip walkthrough if you see green status yet broken pages.

Step 2: domain rules—build an “AI video” bucket, not a single hostname

Prefer a dedicated policy group (for example AI_VIDEO or PROXY_STABLE) and point vendor-related domains at it. The exact list changes; below is illustrative shape only—verify with your logs.

# Illustrative fragment — replace AI_VIDEO with your group name
rules:
  - DOMAIN-SUFFIX,openai.com,AI_VIDEO
  - DOMAIN-SUFFIX,runwayml.com,AI_VIDEO
  # Add CDN hosts from your connection logs
  - MATCH,DIRECT

Keep narrow rules above broad GEOIP and the final MATCH. If a generic MATCH,PROXY sits too high, you may accidentally steer domestic CDNs through a distant exit, which hurts latency-sensitive uploads; if MATCH is too conservative, you may leave the vendor API on DIRECT where it fails.

Step 3: policy groups—stability over “fastest speed test”

For AI video, favor groups that reduce churn and handle long sessions. A hyperactive url-test that flips nodes every minute can break in-flight uploads or OAuth refresh tokens. Consider fallback for resilience, select when you already know a clean line at night, or url-test with conservative intervals and a probe URL that resembles real API traffic—not only a tiny static file.

• Separate “video” from “chat”: if ChatGPT and Sora share infrastructure in your region, you can still split policy groups so congestion in one UI does not force node swaps in the other.
• Separate “video” from “games and streaming”: our Steam and Epic routing guide covers process-based splits; for browsers, domain rules are usually enough.
• Watch concurrent limits: some providers throttle per IP; if your exit rotates too aggressively, you may see more 429s, not fewer.

Step 4: node selection—optimize for sustained uploads, not screenshots

A tall throughput bar does not guarantee smooth video jobs. Prefer exits that show stable loss and jitter on larger transfers. Practical checks:

1. Run a short generation that includes a visible upload; if it fails at the same percentage repeatedly, suspect the path or middleboxes, not the model.
2. Compare peak-hour vs off-peak behavior; if failures cluster at the same clock time, think transit congestion, not “your GPU.”
3. If only one client (browser vs SDK) fails, compare TLS fingerprints and proxy awareness—some stacks ignore system proxy.

Enable provider health checks with sane timeouts where supported; reconcile numbers with how the Runway or Sora UI actually feels, not only with synthetic probes.

If you maintain rule providers or community lists, refresh them on a sensible schedule and diff changes: a newly introduced CDN name is exactly the kind of omission that produces “worked yesterday, broken today” reports in forums. When in doubt, promote a hostname from your logs into an explicit DOMAIN-SUFFIX row tied to your AI video group, then retest with a short clip before you trust long renders. Keep a scratch note of the hostnames you add so the next product update does not send you hunting through old screenshots.

Step 5: API and automation—timeouts, retries, and backoff

Developers calling APIs often see timeouts and 5xx when the network path is flaky or the exit IP changes mid-job. Align the SDK with the same Clash policy group you use in the browser, and keep retry budgets conservative: exponential backoff beats hammering a dying hop. If you run jobs in CI, ensure the runner respects proxy environment variables or use TUN on the host so the job cannot accidentally bypass the tunnel.

Step 6: system proxy vs TUN for stubborn apps

Some desktop shells or Electron apps ignore system proxy. If the browser works but a native client crawls, try TUN for broader capture—while watching for conflicts with corporate VPNs or zero-trust agents. On Windows, complete a baseline Clash for Windows setup first; on macOS, verify Network Extension permissions before you chase rules. TUN amplifies DNS quirks; stabilize DNS first, then layer domain rules.

Quick troubleshooting

Marketing site loads but generation never starts

Trace hostnames during the click that starts the job. Add missing DOMAIN-SUFFIX or CDN rows to your AI video group, and confirm no ad-block list is stripping required scripts.

Uploads stuck at low percent

Check for MTU issues, aggressive QoS, or a node that throttles large bodies. Try a different transport or a quieter exit; compare off-peak hours.

API fails while web works

SDKs may use different endpoints or HTTP/2 behavior. Inspect logs for the failing host and align it with the same policy group as the web flow.

Checklist: steadier Sora and Runway access with Clash in 2026

Want an integrated client that keeps rules legible?

Clash works best when you can read logs, understand policy groups, and update rules without fear. Pick a maintained build that tracks modern cores, then spend your time creating—not debugging invisible routing.

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