1 Complement, not clone: how this extends the OpenAI article
The dedicated OpenAI and ChatGPT guide already explains the split between chatgpt.com and openai.com surfaces, how api.openai.com fits developer flows, and why blunt GEOSITE categories are a weak default. If you only read one piece on text chat and the public API, start there. Sora and similar video experiences add another layer: long-running fetches, adaptive streaming or chunked object delivery, and CDN hostnames that may not look like openai.com at all.
The goal of this follow-up is practical differentiation. Instead of re-listing every generic OpenAI hostname, we focus on symptoms you see when the control plane is routed correctly but a segment or media host stays on the wrong policy—spinners on preview tiles, “failed to load asset” errors, partial uploads, or a completed job whose preview never hydrates. Those failures almost always show up in Mihomo or Clash logs as unexpected suffixes, IPv6 detours, or TLS connections where the SNI was never matched by a DOMAIN rule. Fixing them is a matter of tightening split routing granularity and rule order, not switching models.
2 Why OpenAI video workloads punish shallow rules
Text chat is bursty. Video generation, preview, and even lightweight timeline UI pull far more parallel connections. Browsers and native clients open multiple TLS sessions to object stores, edge caches, and regionally distributed CDN front doors. A policy that only routes api.openai.com may still break the user-visible flow because the first-party HTML shell and JSON calls succeed while dozens of background fetches to asset domains remain on DIRECT and hit a path your ISP throttles or that your region blocks inconsistently. From the user’s perspective, the app “half works,” which is the worst kind of incident because subscription panels look green while the editor canvas stays blank.
Another wrinkle: interactive video surfaces often re-use the same authentication cookies and bearer flows as the rest of ChatGPT, so you cannot simply isolate “Sora” into a hermetic hostname. You model data-plane and control-plane hosts together, then add log-driven rows for the long tail. That is the same pattern enterprises use for complex SaaS, only here the long tail is media-heavy. Treat every unexplained 403, reset, or certificate mismatch as a routing hypothesis until the logs prove otherwise.
Throughput also stresses weak exits. A node that feels fine for short JSON may queue large downloads behind aggressive QoS, causing playback to stutter even though the API reports success. In those cases, consider a dedicated proxy group for media-heavy policy groups, or a node class with higher bandwidth, while keeping the YAML readable—DOMAIN-SUFFIX should still map to predictable groups. If you are building rules from scratch, grab a current client from our download hub so the UI, TUN option, and logging match what this article references; GitHub remains the right place for source and issues, not for casual installer discovery.
3 Control plane: baseline DOMAIN-SUFFIX coverage
Start with the same backbone as the general OpenAI article: DOMAIN-SUFFIX,openai.com and DOMAIN-SUFFIX,chatgpt.com bound to a policy group such as PROXY_OPENAI (name it however your profile already does). The openai.com suffix covers api.openai.com, platform.openai.com, and most first-party web and API calls. The chatgpt.com suffix captures the product shell and many embedded experiences that still carry the ChatGPT label even when a video tool is front and center. Keep these lines above your subscription’s late GEOIP or MATCH rules so a generic catch cannot swallow them; order is not a micro-optimization here—it is the difference between a deterministic and a random outcome.
If you maintain a private classical rule provider, version-control those two suffixes there so operators see a diff when something changes. Public lists move quickly; a tiny checked-in openai-baseline.txt in your own repo ages better than a mystery URL you pasted once in 2023. The rule provider can still fetch a remote bundle for the long tail, but the baseline should be boring and legible. Security teams like boring because it audits cleanly.
sora.example hostname. You still win by nailing the shared OpenAI and ChatGPT graphs plus the media CDN list below.
4 Media, uploads, and segment hostnames in real logs
After the baseline, scan connection logs for asset-like hosts. Engineering posts and public issue threads change over time, but a recurring pattern in OpenAI video and rich-media UIs is additional suffixes for static or user-originated content—examples readers often see include oaistatic.com and oaiusercontent.com, alongside various edge domains that do not end in openai.com. Treat every example in this article as illustrative: the authoritative list is what your client logs under your account type and app version, captured during a real session, not a forum paste from a different continent.
When a preview or timeline tile fails with a 403, TLS error, or endless spinner, open Mihomo’s recent connections view and look for a hostname that is not in your rules: section yet. Append DOMAIN-SUFFIX,that.example,PROXY_OPENAI (or your chosen group) and reload the profile. For frequently shifting edges, a private rule provider you append to weekly beats editing the main config by hand. The goal is to never learn the same CDN name twice: once it appears in a postmortem, it should appear in your Git-tracked rule provider with a short comment describing the product surface.
Upload flows deserve extra attention. Multipart or resumable uploads can hit a different bucket hostname than the download path that serves finished clips. If users report “stuck at 30%,” look for a second hostname family in logs during the outbound direction. Splitters sometimes send POST-heavy hosts through a “cheap” node while small GETs to the first-party domain ride a different exit; latency asymmetry is enough to break vendor timeouts. One steady policy group for all OpenAI-tagged video work usually eliminates that class of bugs.
5 Rule provider layout for teams
A productive structure is two providers: openai-control.yaml (baseline suffixes and stable internal names) and openai-cdn-override.yaml (log-discovered CDN and segment names). Set behavior: classical so you can read the file, keep interval sanely long for static lists, and short for experimental lists you iterate daily. The Mihomo core will merge the sets at runtime; you still need correct rule-providers: path so local dev does not 404. Document who owns the override list; otherwise every rotation brings “quick fixes” that duplicate or contradict each other.
Community rule provider feeds labeled “OpenAI” can bootstrap quickly, but read the policy: ad-blocking oriented lists may drop providers you need, while ultra-broad “AI” sets pull unrelated hostnames. Prefer transparency—if you cannot explain a line, do not ship it. Pair remote lists with local inline DOMAIN-SUFFIX rows for your baseline so you still know what matters when the upstream file disappears. That defensive layering is the difference between a resilient Clash deployment and a fragile one.
6 Example YAML: combine RULE-SET and suffixes
The snippet below is educational. Map PROXY_OPENAI to your real selector, merge with the rest of your proxy-groups: definitions, and validate with the client’s config linter. Notice that the RULE-SET for your curated rule provider is listed before broad catch-alls, and inline DOMAIN-SUFFIX rows backstop anything not yet in the set.
proxy-groups:
- name: PROXY_OPENAI
type: select
proxies:
- AUTO-MEDIA
- AUTO-BEST
- DIRECT
rule-providers:
openai-video-cdn:
type: http
behavior: classical
url: "https://your.git/openai-cdn-override.txt"
path: ./ruleset/openai-video-cdn.yaml
interval: 86400
rules:
- DOMAIN-SUFFIX,openai.com,PROXY_OPENAI
- DOMAIN-SUFFIX,chatgpt.com,PROXY_OPENAI
- RULE-SET,openai-video-cdn,PROXY_OPENAI
- DOMAIN-SUFFIX,oaistatic.com,PROXY_OPENAI
- DOMAIN-SUFFIX,oaiusercontent.com,PROXY_OPENAI
Remove the RULE-SET line if you are not yet hosting a file; the suffix rows alone still get you a long way. Never place these lines after a subscription-provided GEOIP that already sends “unknown” US domains through an unintended exit unless you intend that behavior. If in doubt, export the effective rule table from the client after merge and read it top to bottom; first match wins, always.
7 When DIRECT to a CDN is wrong (and when it is fine)
Some legacy profiles force domestic CDNs to DIRECT to “save” proxy capacity. For global SaaS, that shortcut often backfires: the CDN edge you reach may not be the same region the vendor expects for your account, or your ISP may shape TLS to that edge differently than a clean overseas path. If preview tiles load in one city but not another, that is a hint: A/B the asset hostname through the same PROXY_OPENAI group and measure. If the problem vanishes, your issue was path selection, not OpenAI’s API.
Conversely, if you are certain a particular cache sits inside your own country and the vendor intends local delivery, keeping it on DIRECT can save latency— but only if your logs and compliance stance agree. Video generation is rarely “just a download”; treat each hostname as an experiment until a pattern emerges. When teams disagree, collect ten minutes of log samples from both modes and attach them to the ticket. Emotion is cheap; data ends debates.
8 TUN, native apps, and HTTPS_PROXY
Browsers follow system proxy; many native video or lab tools do not. If you run helper scripts, electron shells, or creative-suite bridges that call OpenAI endpoints without honoring OS proxy, use TUN mode on the Mihomo core or export HTTPS_PROXY to match the mixed port. Our TUN walkthrough for Clash Verge Rev covers loop avoidance and verification steps; the same principles apply whenever you need uniform routing for segment fetches and API calls. Without TUN, you can spend hours “fixing” YAML while a stray process still bypasses it.
If you are containerizing automations, remember that Docker and CI runners have their own network namespaces. A rule on the laptop is invisible inside a test container until you plumb the proxy in compose files or the daemon JSON. The OpenAI video experience may start in a browser, but team workflows often fan out to scripts—keep the egress story coherent across all of them.
9 Clash Meta Sniffer for mystery HTTPS
When TLS arrives on an IP you only know after resolution, or when a middle box rewrites SNI, static DOMAIN lines miss. Enabling the Meta Sniffer lets Mihomo learn the true hostname for policy decisions after decryption policies permit—follow your threat model. If you are chasing a stubborn misroute, read the dedicated sniffer article and align sniffer settings with override-destination as appropriate. Video sessions amplify misroutes because they are long; a wrong choice at handshake time ruins minutes of work.
10 DNS, Fake-IP, and the IPv6 foot-gun
Split-horizon DNS is the silent killer of “perfect” Clash split routing. If Mihomo issues Fake-IP while the operating system still queries the ISP for the same name, the browser and the proxy can disagree on what a hostname means. The DNS leak prevention guide explains DoH, Fake-IP, and nameserver alignment—apply it before you add exotic rule provider files. Video flows make DNS bugs obvious because the player requests dozens of hostnames; one wrong resolver poisons a slice of the queue.
IPv6 adds another class of surprises: a happy-eyeballs stack can prefer a v6 path that Clash is not steering while v4 is. If you see intermittent “works once, fails twice” issues, test with IPv6 temporarily disabled to isolate, then re-enable with a deliberate policy instead of leaving a toggle half-broken. Long term, you want v6 routed, not v6 ignored, but debugging demands isolation.
11 Triage table and short FAQ
Use the following as a quick mental model; adapt labels to your logging UI.
- UI loads, previews never appear: add missing CDN or asset suffixes; confirm
openai.comandchatgpt.comare not skipped by an earlierGEOIPrule. - Uploads stall mid-way: look for a second hostname during POST; match it to the same proxy group as API calls; check MTU and node loss on that path.
- Browser fine, local script broken: TUN or env vars; confirm the script’s working directory does not override
NO_PROXY. - Spurious certificate warnings: first suspect DNS inconsistency, then a captive portal or TLS inspection on the local network, before blaming OpenAI.
FAQ — Is this the same as the Codex CLI guide? No. The Codex CLI article targets npm, registries, and container pulls. This one targets video delivery segments and CDN edges. You may need both on a developer workstation.
12 Wrap-up
In 2026, video generation inside OpenAI products still rides the same account and consent boundaries as the rest of ChatGPT, but the network story is noisier: more hostnames, heavier transfers, and more chances for a CDN edge to end up on the wrong side of a DIRECT rule. Reuse a solid DOMAIN-SUFFIX foundation for openai.com and chatgpt.com, maintain a transparent rule provider for log-discovered segment and media names, and keep rule order above blunt catch-alls. Pair that with honest DNS, optional Sniffer tuning, and TUN or env vars for non-browser stacks, and the “Sora hot but flaky” class of issues shrinks to ordinary operations work instead of superstition.
Tools in the Clash family remain a strong fit because policies stay readable: when something breaks, you can point to a line number, not a prayer. If you need a maintained installer to match these workflows, use the site download page for clients; open-source repositories stay valuable for source and community issues, not as a primary end-user package mirror.
