From 718c7792bbe897f783d962b9870b2198c3d24d70 Mon Sep 17 00:00:00 2001
From: Erin McNulty <erin.mcnulty@braintrustdata.com>
Date: Tue, 22 Sep 2026 15:05:44 -0400
Subject: [PATCH 1/4] strip temp

---
 crates/lingua/src/providers/openai/capabilities.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/crates/lingua/src/providers/openai/capabilities.rs b/crates/lingua/src/providers/openai/capabilities.rs
index bdbf6018..f5a9f22d 100644
--- a/crates/lingua/src/providers/openai/capabilities.rs
+++ b/crates/lingua/src/providers/openai/capabilities.rs
@@ -44,6 +44,7 @@ const MODEL_TRANSFORM_RULES: &[(&str, &[ModelTransform])] = &[
         "gpt-5",
         &[StripTemperature, StripTopP, ForceMaxCompletionTokens],
     ),
+    ("gpt-6", &[StripTemperature]),
     // TODO: would be nice if we could apply these rules by provider instead of model name, and
     // apply these to all Mistral models
     ("mistral", &[ForceMaxTokens]),

From c67cb6985556b0f583aaea2887efbeb10f302b21 Mon Sep 17 00:00:00 2001
From: Erin McNulty <erin.mcnulty@braintrustdata.com>
Date: Tue, 22 Sep 2026 15:07:33 -0400
Subject: [PATCH 2/4] oops

---
 crates/lingua/src/providers/openai/capabilities.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/crates/lingua/src/providers/openai/capabilities.rs b/crates/lingua/src/providers/openai/capabilities.rs
index f5a9f22d..67bdcec1 100644
--- a/crates/lingua/src/providers/openai/capabilities.rs
+++ b/crates/lingua/src/providers/openai/capabilities.rs
@@ -44,7 +44,10 @@ const MODEL_TRANSFORM_RULES: &[(&str, &[ModelTransform])] = &[
         "gpt-5",
         &[StripTemperature, StripTopP, ForceMaxCompletionTokens],
     ),
-    ("gpt-6", &[StripTemperature]),
+    (
+        "gpt-6",
+        &[StripTemperature, StripTopP, ForceMaxCompletionTokens],
+    ),
     // TODO: would be nice if we could apply these rules by provider instead of model name, and
     // apply these to all Mistral models
     ("mistral", &[ForceMaxTokens]),

From 9ededae556c5c343f6c0f479d11323432b7b0ac2 Mon Sep 17 00:00:00 2001
From: Erin McNulty <erin.mcnulty@braintrustdata.com>
Date: Tue, 22 Sep 2026 15:15:35 -0400
Subject: [PATCH 3/4] fix for bedrock too

---
 crates/lingua/src/providers/openai/capabilities.rs | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/crates/lingua/src/providers/openai/capabilities.rs b/crates/lingua/src/providers/openai/capabilities.rs
index 67bdcec1..12d075a0 100644
--- a/crates/lingua/src/providers/openai/capabilities.rs
+++ b/crates/lingua/src/providers/openai/capabilities.rs
@@ -63,8 +63,12 @@ const MODEL_TRANSFORM_RULES: &[(&str, &[ModelTransform])] = &[
 /// Get the transforms required for a model.
 pub fn get_model_transforms(model: &str) -> &'static [ModelTransform] {
     let lower = model.to_ascii_lowercase();
+    let normalized = match lower.strip_prefix("openai.") {
+        Some(normalized) => normalized,
+        None => &lower,
+    };
     for (prefix, transforms) in MODEL_TRANSFORM_RULES {
-        if lower.starts_with(prefix) {
+        if normalized.starts_with(prefix) {
             return transforms;
         }
     }
@@ -372,6 +376,10 @@ mod tests {
                 "gpt-5-mini",
                 &[StripTemperature, StripTopP, ForceMaxCompletionTokens][..],
             ),
+            (
+                "openai.gpt-6-astra",
+                &[StripTemperature, StripTopP, ForceMaxCompletionTokens][..],
+            ),
             ("gpt-4", &[][..]),
             ("gpt-4o", &[][..]),
             ("claude-3", &[][..]),

From d4d18e9c80c5bf8f7702af00573feffa705d5b78 Mon Sep 17 00:00:00 2001
From: Erin McNulty <erin.mcnulty@braintrustdata.com>
Date: Tue, 22 Sep 2026 15:25:28 -0400
Subject: [PATCH 4/4] oops

---
 .../lingua/src/providers/openai/capabilities.rs   | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/crates/lingua/src/providers/openai/capabilities.rs b/crates/lingua/src/providers/openai/capabilities.rs
index 12d075a0..1ad3c1e8 100644
--- a/crates/lingua/src/providers/openai/capabilities.rs
+++ b/crates/lingua/src/providers/openai/capabilities.rs
@@ -62,11 +62,7 @@ const MODEL_TRANSFORM_RULES: &[(&str, &[ModelTransform])] = &[
 
 /// Get the transforms required for a model.
 pub fn get_model_transforms(model: &str) -> &'static [ModelTransform] {
-    let lower = model.to_ascii_lowercase();
-    let normalized = match lower.strip_prefix("openai.") {
-        Some(normalized) => normalized,
-        None => &lower,
-    };
+    let normalized = normalize_openai_model_name(model);
     for (prefix, transforms) in MODEL_TRANSFORM_RULES {
         if normalized.starts_with(prefix) {
             return transforms;
@@ -163,7 +159,10 @@ impl EffortFamily {
 
 fn normalize_openai_model_name(model: &str) -> String {
     let lower = model.to_ascii_lowercase();
-    if let Some(stripped) = lower.strip_prefix("openai/") {
+    if let Some(stripped) = lower
+        .strip_prefix("openai/")
+        .or_else(|| lower.strip_prefix("openai."))
+    {
         stripped.to_string()
     } else {
         lower
@@ -380,6 +379,10 @@ mod tests {
                 "openai.gpt-6-astra",
                 &[StripTemperature, StripTopP, ForceMaxCompletionTokens][..],
             ),
+            (
+                "openai/gpt-6-astra",
+                &[StripTemperature, StripTopP, ForceMaxCompletionTokens][..],
+            ),
             ("gpt-4", &[][..]),
             ("gpt-4o", &[][..]),
             ("claude-3", &[][..]),