Use structured service tiers across core and app-server

codex-rs/app-server-protocol/src/protocol/v2.rs

@@ -26,7 +26,7 @@ use codex_protocol::config_types::ModeKind;
 use codex_protocol::config_types::Personality;
 use codex_protocol::config_types::ReasoningSummary;
 use codex_protocol::config_types::SandboxMode as CoreSandboxMode;
-use codex_protocol::config_types::ServiceTier;
+pub use codex_protocol::config_types::ServiceTier;
 use codex_protocol::config_types::Verbosity;
 use codex_protocol::config_types::WebSearchMode;
 use codex_protocol::config_types::WebSearchToolConfig;
@@ -50,6 +50,7 @@ use codex_protocol::models::PermissionProfile as CorePermissionProfile;
 use codex_protocol::models::ResponseItem;
 use codex_protocol::openai_models::InputModality;
 use codex_protocol::openai_models::ModelAvailabilityNux as CoreModelAvailabilityNux;
+pub use codex_protocol::openai_models::ModelServiceTier;
 use codex_protocol::openai_models::ReasoningEffort;
 use codex_protocol::openai_models::default_input_modalities;
 use codex_protocol::parse_command::ParsedCommand as CoreParsedCommand;
@@ -2527,8 +2528,13 @@ pub struct Model {
     pub input_modalities: Vec<InputModality>,
     #[serde(default)]
     pub supports_personality: bool,
+    /// Deprecated: use `serviceTiers` for structured service-tier metadata.
+    ///
+    /// @deprecated use `serviceTiers` instead.
     #[serde(default)]
     pub additional_speed_tiers: Vec<String>,
+    #[serde(default)]
+    pub service_tiers: Vec<ModelServiceTier>,
     // Only one model should be marked as default.
     pub is_default: bool,
 }

codex-rs/app-server/README.md

@@ -191,7 +191,7 @@ Example with notification opt-out:
 - `fs/watch` — subscribe this connection to filesystem change notifications for an absolute file or directory path and caller-provided `watchId`; returns the canonicalized `path`.
 - `fs/unwatch` — stop sending notifications for a prior `fs/watch`; returns `{}`.
 - `fs/changed` — notification emitted when watched paths change, including the `watchId` and `changedPaths`.
-- `model/list` — list available models (set `includeHidden: true` to include entries with `hidden: true`), with reasoning effort options, `additionalSpeedTiers`, optional legacy `upgrade` model ids, optional `upgradeInfo` metadata (`model`, `upgradeCopy`, `modelLink`, `migrationMarkdown`), and optional `availabilityNux` metadata.
+- `model/list` — list available models (set `includeHidden: true` to include entries with `hidden: true`), with reasoning effort options, `serviceTiers` (`id`, `name`, `description`), deprecated `additionalSpeedTiers`, optional legacy `upgrade` model ids, optional `upgradeInfo` metadata (`model`, `upgradeCopy`, `modelLink`, `migrationMarkdown`), and optional `availabilityNux` metadata.
 - `modelProvider/capabilities/read` — read provider-level capabilities for the currently configured model provider.
 - `experimentalFeature/list` — list feature flags with stage metadata (`beta`, `underDevelopment`, `stable`, etc.), enabled/default-enabled state, and cursor pagination. For non-beta flags, `displayName`/`description`/`announcement` are `null`.
 - `experimentalFeature/enablement/set` — patch the in-memory process-wide runtime feature enablement for the currently supported feature keys (`apps`, `memories`, `plugins`, `remote_control`, `tool_search`, `tool_suggest`, `tool_call_mcp_elicitation`). For each feature, precedence is: cloud requirements > --enable <feature_name> > config.toml > experimentalFeature/enablement/set (new) > code default.