feat: add MiniMax Messages provider

Register MiniMax-M3 and MiniMax-M2.7 for the OpenAI-compatible and Messages routes. Add regional endpoint guidance, request tests, catalog limits, and tier-aware pricing.

Author: octo-patch

crates/agent/src/lib.rs

@@ -776,6 +776,28 @@ impl Default for ModelRegistry {
                 supports_tools: true,
                 supports_reasoning: true,
             },
+            ModelInfo {
+                id: "MiniMax-M3".to_string(),
+                provider: ProviderKind::MinimaxAnthropic,
+                aliases: vec![
+                    "minimax-anthropic".to_string(),
+                    "minimax-anthropic-m3".to_string(),
+                    "minimax-m3".to_string(),
+                ],
+                supports_tools: true,
+                supports_reasoning: true,
+            },
+            ModelInfo {
+                id: "MiniMax-M2.7".to_string(),
+                provider: ProviderKind::MinimaxAnthropic,
+                aliases: vec![
+                    "minimax-anthropic-m2.7".to_string(),
+                    "minimax-anthropic-m2-7".to_string(),
+                    "minimax-m2.7".to_string(),
+                ],
+                supports_tools: true,
+                supports_reasoning: true,
+            },
             ModelInfo {
                 id: "MiniMax-M2.7-highspeed".to_string(),
                 provider: ProviderKind::Minimax,
@@ -1561,6 +1583,7 @@ mod tests {
             (ProviderKind::Zai, "GLM-5.2"),
             (ProviderKind::Stepfun, "step-3.7-flash"),
             (ProviderKind::Minimax, "MiniMax-M2.1"),
+            (ProviderKind::MinimaxAnthropic, "MiniMax-M3"),
             (ProviderKind::Openmodel, "deepseek-v4-flash"),
             (ProviderKind::Meta, "muse-spark-1.1"),
             (ProviderKind::Xai, "grok-4.5"),
@@ -1661,6 +1684,25 @@ mod tests {
         }
     }
 
+    #[test]
+    fn minimax_anthropic_models_resolve_when_provider_hinted() {
+        let registry = ModelRegistry::default();
+
+        for (alias, expected) in [
+            ("minimax-anthropic", "MiniMax-M3"),
+            ("minimax-m3", "MiniMax-M3"),
+            ("minimax-m2.7", "MiniMax-M2.7"),
+        ] {
+            let resolved = registry.resolve(Some(alias), Some(ProviderKind::MinimaxAnthropic));
+
+            assert_eq!(resolved.resolved.provider, ProviderKind::MinimaxAnthropic);
+            assert_eq!(resolved.resolved.id, expected);
+            assert!(!resolved.used_fallback);
+            assert!(resolved.resolved.supports_tools);
+            assert!(resolved.resolved.supports_reasoning);
+        }
+    }
+
     #[test]
     fn deepseek_v4_flash_alias_resolves_to_openrouter_when_provider_hinted() {
         let registry = ModelRegistry::default();

crates/cli/src/lib.rs

@@ -61,6 +61,12 @@ enum ProviderArg {
     Zai,
     Stepfun,
     Minimax,
+    #[value(
+        alias = "minimax_anthropic",
+        alias = "mini-max-anthropic",
+        alias = "mini_max_anthropic"
+    )]
+    MinimaxAnthropic,
     #[value(alias = "deep-infra", alias = "deep_infra")]
     Deepinfra,
     #[value(alias = "fugu", alias = "sakana-ai", alias = "sakana_ai")]
@@ -107,6 +113,7 @@ impl From<ProviderArg> for ProviderKind {
             ProviderArg::Zai => ProviderKind::Zai,
             ProviderArg::Stepfun => ProviderKind::Stepfun,
             ProviderArg::Minimax => ProviderKind::Minimax,
+            ProviderArg::MinimaxAnthropic => ProviderKind::MinimaxAnthropic,
             ProviderArg::Deepinfra => ProviderKind::Deepinfra,
             ProviderArg::Sakana => ProviderKind::Sakana,
             ProviderArg::LongCat => ProviderKind::LongCat,
@@ -4336,6 +4343,8 @@ mod tests {
             ("zai", ProviderArg::Zai),
             ("stepfun", ProviderArg::Stepfun),
             ("minimax", ProviderArg::Minimax),
+            ("minimax-anthropic", ProviderArg::MinimaxAnthropic),
+            ("minimax_anthropic", ProviderArg::MinimaxAnthropic),
             ("deepinfra", ProviderArg::Deepinfra),
             ("deep-infra", ProviderArg::Deepinfra),
             ("siliconflow-cn", ProviderArg::SiliconflowCn),

crates/config/assets/models_dev.bundled.json

@@ -6,7 +6,7 @@
     "source": "Compact offline seed of verified in-repo defaults (context/output from crates/tui/src/models.rs; USD pricing from crates/tui/src/pricing.rs) for providers CodeWhale ships with. It is intentionally smaller than a full Models.dev dump; live refresh supersedes these rows on (provider, wire_model_id) identity.",
     "honesty": "Pricing is intentionally OMITTED where the repo does not publish a trustworthy per-token rate: DeepSeek-native rows (priced via the time-aware DeepSeek table elsewhere, kept UnknownOrStale at the route layer), aggregator-hosted DeepSeek rows (aggregator account terms, not DeepSeek Platform pricing), and Xiaomi MiMo rows (published PAYG rates apply only to sk- pay-as-you-go keys; the catalog cannot distinguish that billing surface from credit/quota Token Plan keys, so MiMo stays unpriced). Absent pricing surfaces as PricingSku::UnknownOrStale, never a fabricated zero.",
     "default_rows": "Each provider's `default: true` wire id equals that provider's built-in DEFAULT_*_MODEL so RouteResolver::new() and the descriptor stay in agreement when offline.",
-    "coverage": "14 providers, 42 chat offerings (offline seed only)."
+    "coverage": "15 providers, 44 chat offerings (offline seed only)."
   },
   "models": {
     "deepseek-v4-pro": {
@@ -144,20 +144,63 @@
           "name": "MiniMax M3",
           "family": "minimax",
           "default": true,
+          "attachment": true,
           "reasoning": true,
+          "reasoning_options": [
+            { "type": "thinking", "values": ["adaptive", "disabled"], "default": "adaptive" }
+          ],
+          "tool_call": true,
+          "modalities": { "input": ["text", "image", "video"], "output": ["text"] },
+          "limit": { "context": 1000000, "output": 524288 }
+        },
+        "MiniMax-M2.7": {
+          "id": "MiniMax-M2.7",
+          "name": "MiniMax M2.7",
+          "family": "minimax",
+          "reasoning": true,
+          "reasoning_options": [
+            { "type": "thinking", "values": ["always_on"], "default": "always_on" }
+          ],
           "tool_call": true,
           "modalities": { "input": ["text"], "output": ["text"] },
-          "limit": { "context": 1000000, "output": 524288 },
-          "cost": { "input": 0.30, "output": 1.20, "cache_read": 0.06 }
+          "limit": { "context": 204800, "output": 204800 },
+          "cost": { "input": 0.30, "output": 1.20, "cache_read": 0.06, "cache_write": 0.375 }
+        }
+      }
+    },
+    "minimax-anthropic": {
+      "id": "minimax-anthropic",
+      "name": "MiniMax (Anthropic-compatible)",
+      "api": "https://api.minimax.io/anthropic",
+      "npm": "@ai-sdk/anthropic",
+      "env": ["MINIMAX_API_KEY"],
+      "models": {
+        "MiniMax-M3": {
+          "id": "MiniMax-M3",
+          "name": "MiniMax M3",
+          "family": "minimax",
+          "default": true,
+          "attachment": true,
+          "reasoning": true,
+          "reasoning_options": [
+            { "type": "thinking", "values": ["adaptive", "disabled"], "default": "disabled" }
+          ],
+          "tool_call": true,
+          "modalities": { "input": ["text", "image", "video"], "output": ["text"] },
+          "limit": { "context": 1000000, "output": 524288 }
         },
-        "minimax-m2.7": {
-          "id": "minimax-m2.7",
+        "MiniMax-M2.7": {
+          "id": "MiniMax-M2.7",
           "name": "MiniMax M2.7",
           "family": "minimax",
           "reasoning": true,
+          "reasoning_options": [
+            { "type": "thinking", "values": ["always_on"], "default": "always_on" }
+          ],
           "tool_call": true,
           "modalities": { "input": ["text"], "output": ["text"] },
-          "limit": { "context": 204800, "output": 204800 }
+          "limit": { "context": 204800, "output": 204800 },
+          "cost": { "input": 0.30, "output": 1.20, "cache_read": 0.06, "cache_write": 0.375 }
         }
       }
     },

crates/config/src/catalog/tests.rs

@@ -587,6 +587,39 @@ fn bundled_asset_yields_real_chat_offerings_for_key_models() {
     let kimi = find(&rows, "moonshot", "kimi-k2.7-code");
     assert_eq!(kimi.limit.as_ref().and_then(|l| l.context), Some(262_144));
 
+    let minimax_m3 = find(&rows, "minimax-anthropic", "MiniMax-M3");
+    assert_eq!(
+        minimax_m3.limit.as_ref().and_then(|limit| limit.context),
+        Some(1_000_000)
+    );
+    let input_modalities = minimax_m3
+        .modalities
+        .as_ref()
+        .expect("M3 modalities")
+        .input
+        .iter()
+        .map(String::as_str)
+        .collect::<Vec<_>>();
+    assert_eq!(input_modalities, ["text", "image", "video"]);
+    assert_eq!(
+        minimax_m3.reasoning_options[0]
+            .get("default")
+            .and_then(serde_json::Value::as_str),
+        Some("disabled")
+    );
+
+    let minimax_m2_7 = find(&rows, "minimax-anthropic", "MiniMax-M2.7");
+    assert_eq!(
+        minimax_m2_7.limit.as_ref().and_then(|limit| limit.context),
+        Some(204_800)
+    );
+    assert_eq!(
+        minimax_m2_7.reasoning_options[0]
+            .get("default")
+            .and_then(serde_json::Value::as_str),
+        Some("always_on")
+    );
+
     // Audio/TTS rows are absent (the asset only ships chat models, but assert
     // the filter contract anyway).
     assert!(
@@ -629,6 +662,18 @@ fn bundled_asset_pricing_is_honest() {
     assert_eq!(cost.input, Some(1.40));
     assert_eq!(cost.output, Some(4.40));
     assert_eq!(cost.cache_read, Some(0.26));
+
+    // M3 has input-length and service tiers that the flat catalog cost shape
+    // cannot represent, so the bundled route row stays honestly unpriced.
+    let minimax_m3 = find(&rows, "minimax-anthropic", "MiniMax-M3");
+    assert!(minimax_m3.cost.is_none());
+
+    let minimax_m2_7 = find(&rows, "minimax-anthropic", "MiniMax-M2.7");
+    let cost = minimax_m2_7.cost.as_ref().expect("M2.7 is priced");
+    assert_eq!(cost.input, Some(0.30));
+    assert_eq!(cost.output, Some(1.20));
+    assert_eq!(cost.cache_read, Some(0.06));
+    assert_eq!(cost.cache_write, Some(0.375));
 }
 
 #[test]

crates/config/src/lib.rs

@@ -224,6 +224,15 @@ pub struct ProvidersToml {
         alias = "minimax"
     )]
     pub minimax: ProviderConfigToml,
+    #[serde(
+        default,
+        skip_serializing_if = "ProviderConfigToml::is_empty",
+        alias = "minimax-anthropic",
+        alias = "minimaxAnthropic",
+        alias = "mini-max-anthropic",
+        alias = "mini_max_anthropic"
+    )]
+    pub minimax_anthropic: ProviderConfigToml,
     #[serde(
         default,
         skip_serializing_if = "ProviderConfigToml::is_empty",
@@ -369,6 +378,7 @@ impl ProvidersToml {
             ProviderKind::Zai => &self.zai,
             ProviderKind::Stepfun => &self.stepfun,
             ProviderKind::Minimax => &self.minimax,
+            ProviderKind::MinimaxAnthropic => &self.minimax_anthropic,
             ProviderKind::Deepinfra => &self.deepinfra,
             ProviderKind::Sakana => &self.sakana,
             ProviderKind::LongCat => &self.longcat,
@@ -407,6 +417,7 @@ impl ProvidersToml {
             ProviderKind::Zai => &mut self.zai,
             ProviderKind::Stepfun => &mut self.stepfun,
             ProviderKind::Minimax => &mut self.minimax,
+            ProviderKind::MinimaxAnthropic => &mut self.minimax_anthropic,
             ProviderKind::Deepinfra => &mut self.deepinfra,
             ProviderKind::Sakana => &mut self.sakana,
             ProviderKind::LongCat => &mut self.longcat,
@@ -2260,6 +2271,7 @@ impl ConfigToml {
                 ProviderKind::Zai => DEFAULT_ZAI_BASE_URL.to_string(),
                 ProviderKind::Stepfun => DEFAULT_STEPFUN_BASE_URL.to_string(),
                 ProviderKind::Minimax => DEFAULT_MINIMAX_BASE_URL.to_string(),
+                ProviderKind::MinimaxAnthropic => DEFAULT_MINIMAX_ANTHROPIC_BASE_URL.to_string(),
                 ProviderKind::Deepinfra => DEFAULT_DEEPINFRA_BASE_URL.to_string(),
                 ProviderKind::Sakana => DEFAULT_SAKANA_BASE_URL.to_string(),
                 ProviderKind::LongCat => DEFAULT_LONGCAT_BASE_URL.to_string(),
@@ -2495,8 +2507,10 @@ fn normalize_model_for_provider(provider: ProviderKind, model: &str) -> String {
     {
         return canonical.to_string();
     }
-    if matches!(provider, ProviderKind::Minimax)
-        && let Some(canonical) = canonical_minimax_model_id(model)
+    if matches!(
+        provider,
+        ProviderKind::Minimax | ProviderKind::MinimaxAnthropic
+    ) && let Some(canonical) = canonical_minimax_model_id(model)
     {
         return canonical.to_string();
     }
@@ -2515,6 +2529,7 @@ fn normalize_model_for_provider(provider: ProviderKind, model: &str) -> String {
             | ProviderKind::Zai
             | ProviderKind::Stepfun
             | ProviderKind::Minimax
+            | ProviderKind::MinimaxAnthropic
             | ProviderKind::Qianfan
             | ProviderKind::Ollama
             | ProviderKind::Meta
@@ -2840,7 +2855,7 @@ fn default_model_for_provider(provider: ProviderKind) -> &'static str {
         ProviderKind::Openmodel => DEFAULT_OPENMODEL_MODEL,
         ProviderKind::Zai => DEFAULT_ZAI_MODEL,
         ProviderKind::Stepfun => DEFAULT_STEPFUN_MODEL,
-        ProviderKind::Minimax => DEFAULT_MINIMAX_MODEL,
+        ProviderKind::Minimax | ProviderKind::MinimaxAnthropic => DEFAULT_MINIMAX_MODEL,
         ProviderKind::Deepinfra => DEFAULT_DEEPINFRA_MODEL,
         ProviderKind::Sakana => DEFAULT_SAKANA_MODEL,
         ProviderKind::LongCat => DEFAULT_LONGCAT_MODEL,
@@ -2880,6 +2895,7 @@ fn default_base_url_for_provider(provider: ProviderKind) -> &'static str {
         ProviderKind::Zai => DEFAULT_ZAI_BASE_URL,
         ProviderKind::Stepfun => DEFAULT_STEPFUN_BASE_URL,
         ProviderKind::Minimax => DEFAULT_MINIMAX_BASE_URL,
+        ProviderKind::MinimaxAnthropic => DEFAULT_MINIMAX_ANTHROPIC_BASE_URL,
         ProviderKind::Deepinfra => DEFAULT_DEEPINFRA_BASE_URL,
         ProviderKind::Sakana => DEFAULT_SAKANA_BASE_URL,
         ProviderKind::LongCat => DEFAULT_LONGCAT_BASE_URL,
@@ -4423,6 +4439,7 @@ struct EnvRuntimeOverrides {
     stepfun_base_url: Option<String>,
     stepfun_model: Option<String>,
     minimax_base_url: Option<String>,
+    minimax_anthropic_base_url: Option<String>,
     minimax_model: Option<String>,
     deepinfra_base_url: Option<String>,
     deepinfra_model: Option<String>,
@@ -4657,6 +4674,9 @@ impl EnvRuntimeOverrides {
             minimax_base_url: std::env::var("MINIMAX_BASE_URL")
                 .ok()
                 .filter(|v| !v.trim().is_empty()),
+            minimax_anthropic_base_url: std::env::var("MINIMAX_ANTHROPIC_BASE_URL")
+                .ok()
+                .filter(|v| !v.trim().is_empty()),
             minimax_model: std::env::var("MINIMAX_MODEL")
                 .ok()
                 .filter(|v| !v.trim().is_empty()),
@@ -4749,6 +4769,7 @@ impl EnvRuntimeOverrides {
             ProviderKind::Zai => self.zai_base_url.clone(),
             ProviderKind::Stepfun => self.stepfun_base_url.clone(),
             ProviderKind::Minimax => self.minimax_base_url.clone(),
+            ProviderKind::MinimaxAnthropic => self.minimax_anthropic_base_url.clone(),
             ProviderKind::Deepinfra => self.deepinfra_base_url.clone(),
             ProviderKind::Sakana => self.sakana_base_url.clone(),
             ProviderKind::LongCat => self.longcat_base_url.clone(),
@@ -4781,7 +4802,7 @@ impl EnvRuntimeOverrides {
             ProviderKind::Openmodel => self.openmodel_model.clone(),
             ProviderKind::Zai => self.zai_model.clone(),
             ProviderKind::Stepfun => self.stepfun_model.clone(),
-            ProviderKind::Minimax => self.minimax_model.clone(),
+            ProviderKind::Minimax | ProviderKind::MinimaxAnthropic => self.minimax_model.clone(),
             ProviderKind::Deepinfra => self.deepinfra_model.clone(),
             ProviderKind::Sakana => self.sakana_model.clone(),
             ProviderKind::LongCat => self.longcat_model.clone(),