feat(openrouter): add Mistral Small 4 (mistral-small-2603)

Co-authored-by: petit-blaireau <1893252+petit-blaireau@users.noreply.github.com>
Agent-Logs-Url: https://github.com/petit-blaireau/models.dev/sessions/871bbf50-3ef0-4926-afd1-e95c79f6bd57

Author: Copilot

providers/openrouter/models/mistralai/mistral-small-2603.toml

@@ -0,0 +1,23 @@
+id = "mistralai/mistral-small-2603"
+name = "Mistral Small 4"
+family = "mistral-small"
+release_date = "2026-03-16"
+last_updated = "2026-03-16"
+attachment = true
+reasoning = true
+temperature = true
+knowledge = "2025-06"
+tool_call = true
+open_weights = true
+
+[cost]
+input = 0.15
+output = 0.60
+
+[limit]
+context = 262_144
+output = 262_144
+
+[modalities]
+input = ["text", "image"]
+output = ["text"]