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Add max context window model metadata (#18382)

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Adds max_context_window to model metadata and routes core context-window
reads through resolved model info. Config model_context_window overrides
are clamped to max_context_window when present; without an override, the
model context_window is used.
This commit is contained in:
Ahmed Ibrahim
2026-04-17 21:48:14 -07:00
committed by GitHub
parent e9c70fff3f
commit 5bb193aa88
17 changed files with 330 additions and 6 deletions
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codex-rs/models-manager/models.json
+13
View File
@@ -15,6 +15,7 @@
},
"supports_parallel_tool_calls": true,
"context_window": 272000,
"max_context_window": 272000,
"reasoning_summary_format": "experimental",
"default_reasoning_summary": "none",
"slug": "gpt-5.3-codex",
@@ -88,6 +89,7 @@
},
"supports_parallel_tool_calls": true,
"context_window": 272000,
"max_context_window": 1000000,
"reasoning_summary_format": "experimental",
"default_reasoning_summary": "none",
"slug": "gpt-5.4",
@@ -161,6 +163,7 @@
},
"supports_parallel_tool_calls": true,
"context_window": 272000,
"max_context_window": 272000,
"reasoning_summary_format": "experimental",
"default_reasoning_summary": "auto",
"slug": "gpt-5.2-codex",
@@ -235,6 +238,7 @@
},
"supports_parallel_tool_calls": false,
"context_window": 272000,
"max_context_window": 272000,
"reasoning_summary_format": "experimental",
"default_reasoning_summary": "auto",
"slug": "gpt-5.1-codex-max",
@@ -302,6 +306,7 @@
},
"supports_parallel_tool_calls": false,
"context_window": 272000,
"max_context_window": 272000,
"reasoning_summary_format": "experimental",
"default_reasoning_summary": "auto",
"slug": "gpt-5.1-codex",
@@ -365,6 +370,7 @@
},
"supports_parallel_tool_calls": true,
"context_window": 272000,
"max_context_window": 272000,
"reasoning_summary_format": "none",
"default_reasoning_summary": "auto",
"slug": "gpt-5.2",
@@ -432,6 +438,7 @@
},
"supports_parallel_tool_calls": true,
"context_window": 272000,
"max_context_window": 272000,
"reasoning_summary_format": "none",
"default_reasoning_summary": "auto",
"slug": "gpt-5.1",
@@ -495,6 +502,7 @@
},
"supports_parallel_tool_calls": false,
"context_window": 272000,
"max_context_window": 272000,
"reasoning_summary_format": "experimental",
"default_reasoning_summary": "auto",
"slug": "gpt-5-codex",
@@ -558,6 +566,7 @@
},
"supports_parallel_tool_calls": false,
"context_window": 272000,
"max_context_window": 272000,
"reasoning_summary_format": "none",
"default_reasoning_summary": "auto",
"slug": "gpt-5",
@@ -624,6 +633,7 @@
},
"supports_parallel_tool_calls": false,
"context_window": 128000,
"max_context_window": 128000,
"reasoning_summary_format": "none",
"default_reasoning_summary": "auto",
"slug": "gpt-oss-120b",
@@ -683,6 +693,7 @@
},
"supports_parallel_tool_calls": false,
"context_window": 128000,
"max_context_window": 128000,
"reasoning_summary_format": "none",
"default_reasoning_summary": "auto",
"slug": "gpt-oss-20b",
@@ -743,6 +754,7 @@
},
"supports_parallel_tool_calls": false,
"context_window": 272000,
"max_context_window": 272000,
"reasoning_summary_format": "experimental",
"default_reasoning_summary": "auto",
"slug": "gpt-5.1-codex-mini",
@@ -802,6 +814,7 @@
},
"supports_parallel_tool_calls": false,
"context_window": 272000,
"max_context_window": 272000,
"reasoning_summary_format": "experimental",
"default_reasoning_summary": "auto",
"slug": "gpt-5-codex-mini",
codex-rs/models-manager/src/manager_tests.rs
+1
View File
@@ -70,6 +70,7 @@ fn remote_model_with_visibility(
"supports_parallel_tool_calls": false,
"supports_image_detail_original": false,
"context_window": 272_000,
"max_context_window": 272_000,
"experimental_supported_tools": [],
}))
.expect("valid model")
codex-rs/models-manager/src/model_info.rs
+8 -1
View File
@@ -27,7 +27,13 @@ pub fn with_config_overrides(mut model: ModelInfo, config: &ModelsManagerConfig)
model.supports_reasoning_summaries = true;
}
if let Some(context_window) = config.model_context_window {
model.context_window = Some(context_window);
model.context_window = Some(
model
.max_context_window
.map_or(context_window, |max_context_window| {
context_window.min(max_context_window)
}),
);
}
if let Some(auto_compact_token_limit) = config.model_auto_compact_token_limit {
model.auto_compact_token_limit = Some(auto_compact_token_limit);
@@ -84,6 +90,7 @@ pub fn model_info_from_slug(slug: &str) -> ModelInfo {
supports_parallel_tool_calls: false,
supports_image_detail_original: false,
context_window: Some(272_000),
max_context_window: Some(272_000),
auto_compact_token_limit: None,
effective_context_window_percent: 95,
experimental_supported_tools: Vec::new(),
codex-rs/models-manager/src/model_info_tests.rs
+29
View File
@@ -43,3 +43,32 @@ fn reasoning_summaries_override_false_is_noop_when_model_is_false() {
assert_eq!(updated, model);
}
#[test]
fn model_context_window_override_clamps_to_max_context_window() {
let mut model = model_info_from_slug("unknown-model");
model.context_window = Some(273_000);
model.max_context_window = Some(400_000);
let config = ModelsManagerConfig {
model_context_window: Some(500_000),
..Default::default()
};
let updated = with_config_overrides(model.clone(), &config);
let mut expected = model;
expected.context_window = Some(400_000);
assert_eq!(updated, expected);
}
#[test]
fn model_context_window_uses_model_value_without_override() {
let mut model = model_info_from_slug("unknown-model");
model.context_window = Some(273_000);
model.max_context_window = Some(400_000);
let config = ModelsManagerConfig::default();
let updated = with_config_overrides(model.clone(), &config);
assert_eq!(updated, model);
}