diff --git a/pkg/llm/llm.go b/pkg/llm/llm.go
index 6afedc2e0..f53c99d93 100644
--- a/pkg/llm/llm.go
+++ b/pkg/llm/llm.go
@@ -17,7 +17,6 @@ package llm
 import (
 	"context"
 	"io"
-	"strings"
 	"time"
 
 	"go.gearno.de/kit/log"
@@ -73,8 +72,6 @@ func NewClient(provider Provider, system string, opts ...Option) *Client {
 }
 
 func (c *Client) ChatCompletion(ctx context.Context, req *ChatCompletionRequest) (*ChatCompletionResponse, error) {
-	req = sanitizeRequest(ctx, c.logger, req)
-
 	ctx, span := startChatSpan(ctx, c.tracer, c.system, req)
 
 	c.logger.InfoCtx(
@@ -118,8 +115,6 @@ func (c *Client) ChatCompletion(ctx context.Context, req *ChatCompletionRequest)
 }
 
 func (c *Client) ChatCompletionStream(ctx context.Context, req *ChatCompletionRequest) (ChatCompletionStream, error) {
-	req = sanitizeRequest(ctx, c.logger, req)
-
 	ctx, span := startChatSpan(ctx, c.tracer, c.system, req)
 
 	c.logger.InfoCtx(
@@ -145,75 +140,3 @@ func (c *Client) ChatCompletionStream(ctx context.Context, req *ChatCompletionRe
 
 	return newTracedStream(stream, span), nil
 }
-
-// sanitizeRequest drops sampling parameters the target model does not
-// accept, using the default model registry. Reasoning models (e.g. the
-// GPT-5 family) reject an explicit temperature, top_p, or penalties and
-// fail the whole request with a 400, so the safest behavior is to omit
-// the unsupported knobs rather than propagate a hard error. When the
-// model is unknown to the registry the request is left untouched.
-func sanitizeRequest(ctx context.Context, logger *log.Logger, req *ChatCompletionRequest) *ChatCompletionRequest {
-	if req == nil {
-		return req
-	}
-
-	model, ok := DefaultRegistry().Lookup(req.Model)
-	if !ok {
-		return req
-	}
-
-	supports := model.Supports
-
-	dropTemperature := req.Temperature != nil && !supports.Temperature
-	dropTopP := req.TopP != nil && !supports.TopP
-	dropFrequencyPenalty := req.FrequencyPenalty != nil && !supports.FrequencyPenalty
-	dropPresencePenalty := req.PresencePenalty != nil && !supports.PresencePenalty
-	dropStop := len(req.StopSequences) > 0 && !supports.Stop
-
-	if !dropTemperature && !dropTopP && !dropFrequencyPenalty && !dropPresencePenalty && !dropStop {
-		return req
-	}
-
-	sanitized := *req
-
-	dropped := make([]string, 0, 5)
-
-	if dropTemperature {
-		sanitized.Temperature = nil
-
-		dropped = append(dropped, "temperature")
-	}
-
-	if dropTopP {
-		sanitized.TopP = nil
-
-		dropped = append(dropped, "top_p")
-	}
-
-	if dropFrequencyPenalty {
-		sanitized.FrequencyPenalty = nil
-
-		dropped = append(dropped, "frequency_penalty")
-	}
-
-	if dropPresencePenalty {
-		sanitized.PresencePenalty = nil
-
-		dropped = append(dropped, "presence_penalty")
-	}
-
-	if dropStop {
-		sanitized.StopSequences = nil
-
-		dropped = append(dropped, "stop")
-	}
-
-	logger.WarnCtx(
-		ctx,
-		"dropping unsupported sampling parameters for model",
-		log.String("model", req.Model),
-		log.String("dropped", strings.Join(dropped, ",")),
-	)
-
-	return &sanitized
-}