diff --git a/go.mod b/go.mod
index 331cfabd42a992e8c3b99dfd1ca2e7a632db1c25..c9b819dfcdd6cf934b99d74098038db503ec6b16 100644
--- a/go.mod
+++ b/go.mod
@@ -14,7 +14,7 @@ require (
 	github.com/charlievieth/fastwalk v1.0.11
 	github.com/charmbracelet/bubbles/v2 v2.0.0-beta.1.0.20250716191546-1e2ffbbcf5c5
 	github.com/charmbracelet/bubbletea/v2 v2.0.0-beta.4.0.20250724172607-5ba56e2bec69
-	github.com/charmbracelet/catwalk v0.3.1
+	github.com/charmbracelet/catwalk v0.3.5
 	github.com/charmbracelet/fang v0.3.1-0.20250711140230-d5ebb8c1d674
 	github.com/charmbracelet/glamour/v2 v2.0.0-20250516160903-6f1e2c8f9ebe
 	github.com/charmbracelet/lipgloss/v2 v2.0.0-beta.3.0.20250721205738-ea66aa652ee0
@@ -126,13 +126,13 @@ require (
 	go.opentelemetry.io/otel/metric v1.35.0 // indirect
 	go.opentelemetry.io/otel/trace v1.35.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
-	golang.org/x/crypto v0.37.0 // indirect
+	golang.org/x/crypto v0.38.0 // indirect
 	golang.org/x/image v0.26.0 // indirect
-	golang.org/x/net v0.39.0 // indirect
+	golang.org/x/net v0.40.0 // indirect
 	golang.org/x/sync v0.16.0 // indirect
 	golang.org/x/sys v0.34.0
 	golang.org/x/term v0.32.0 // indirect
-	golang.org/x/text v0.24.0
+	golang.org/x/text v0.25.0
 	google.golang.org/genai v1.3.0
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20250324211829-b45e905df463 // indirect
 	google.golang.org/grpc v1.71.0 // indirect
diff --git a/go.sum b/go.sum
index c228e68ab75edd1312f60422cbea15df5a8c0fea..95cd23f5b4614b6a24491aa9fe64809dc282212a 100644
--- a/go.sum
+++ b/go.sum
@@ -72,8 +72,8 @@ github.com/charmbracelet/bubbles/v2 v2.0.0-beta.1.0.20250716191546-1e2ffbbcf5c5
 github.com/charmbracelet/bubbles/v2 v2.0.0-beta.1.0.20250716191546-1e2ffbbcf5c5/go.mod h1:6HamsBKWqEC/FVHuQMHgQL+knPyvHH55HwJDHl/adMw=
 github.com/charmbracelet/bubbletea/v2 v2.0.0-beta.4.0.20250724172607-5ba56e2bec69 h1:nXLMl4ows2qogDXhuEtDNgFNXQiU+PJer+UEBsQZuns=
 github.com/charmbracelet/bubbletea/v2 v2.0.0-beta.4.0.20250724172607-5ba56e2bec69/go.mod h1:XIQ1qQfRph6Z5o2EikCydjumo0oDInQySRHuPATzbZc=
-github.com/charmbracelet/catwalk v0.3.1 h1:MkGWspcMyE659zDkqS+9wsaCMTKRFEDBFY2A2sap6+U=
-github.com/charmbracelet/catwalk v0.3.1/go.mod h1:gUUCqqZ8bk4D7ZzGTu3I77k7cC2x4exRuJBN1H2u2pc=
+github.com/charmbracelet/catwalk v0.3.5 h1:ChMvA5ooTNZhDKFagmGNQgIZvZp8XjpdaJ+cDmhgCgA=
+github.com/charmbracelet/catwalk v0.3.5/go.mod h1:gUUCqqZ8bk4D7ZzGTu3I77k7cC2x4exRuJBN1H2u2pc=
 github.com/charmbracelet/colorprofile v0.3.1 h1:k8dTHMd7fgw4bnFd7jXTLZrSU/CQrKnL3m+AxCzDz40=
 github.com/charmbracelet/colorprofile v0.3.1/go.mod h1:/GkGusxNs8VB/RSOh3fu0TJmQ4ICMMPApIIVn0KszZ0=
 github.com/charmbracelet/fang v0.3.1-0.20250711140230-d5ebb8c1d674 h1:+Cz+VfxD5DO+JT1LlswXWhre0HYLj6l2HW8HVGfMuC0=
@@ -298,8 +298,8 @@ golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5y
 golang.org/x/crypto v0.19.0/go.mod h1:Iy9bg/ha4yyC70EfRS8jz+B6ybOBKMaSxLj6P6oBDfU=
 golang.org/x/crypto v0.22.0/go.mod h1:vr6Su+7cTlO45qkww3VDJlzDn0ctJvRgYbC2NvXHt+M=
 golang.org/x/crypto v0.23.0/go.mod h1:CKFgDieR+mRhux2Lsu27y0fO304Db0wZe70UKqHu0v8=
-golang.org/x/crypto v0.37.0 h1:kJNSjF/Xp7kU0iB2Z+9viTPMW4EqqsrywMXLJOOsXSE=
-golang.org/x/crypto v0.37.0/go.mod h1:vg+k43peMZ0pUMhYmVAWysMK35e6ioLh3wB8ZCAfbVc=
+golang.org/x/crypto v0.38.0 h1:jt+WWG8IZlBnVbomuhg2Mdq0+BBQaHbtqHEFEigjUV8=
+golang.org/x/crypto v0.38.0/go.mod h1:MvrbAqul58NNYPKnOra203SB9vpuZW0e+RRZV+Ggqjw=
 golang.org/x/exp v0.0.0-20250305212735-054e65f0b394 h1:nDVHiLt8aIbd/VzvPWN6kSOPE7+F/fNFDSXLVYkE/Iw=
 golang.org/x/exp v0.0.0-20250305212735-054e65f0b394/go.mod h1:sIifuuw/Yco/y6yb6+bDNfyeQ/MdPUy/hKEMYQV17cM=
 golang.org/x/image v0.26.0 h1:4XjIFEZWQmCZi6Wv8BoxsDhRU3RVnLX04dToTDAEPlY=
@@ -315,8 +315,8 @@ golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
 golang.org/x/net v0.21.0/go.mod h1:bIjVDfnllIU7BJ2DNgfnXvpSvtn8VRwhlsaeUTyUS44=
 golang.org/x/net v0.24.0/go.mod h1:2Q7sJY5mzlzWjKtYUEXSlBWCdyaioyXzRB2RtU8KVE8=
 golang.org/x/net v0.25.0/go.mod h1:JkAGAh7GEvH74S6FOH42FLoXpXbE/aqXSrIQjXgsiwM=
-golang.org/x/net v0.39.0 h1:ZCu7HMWDxpXpaiKdhzIfaltL9Lp31x/3fCP11bc6/fY=
-golang.org/x/net v0.39.0/go.mod h1:X7NRbYVEA+ewNkCNyJ513WmMdQ3BineSwVtN2zD/d+E=
+golang.org/x/net v0.40.0 h1:79Xs7wF06Gbdcg4kdCCIQArK11Z1hr5POQ6+fIYHNuY=
+golang.org/x/net v0.40.0/go.mod h1:y0hY0exeL2Pku80/zKK7tpntoX23cqL3Oa6njdgRtds=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -354,8 +354,8 @@ golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
 golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 golang.org/x/text v0.15.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
-golang.org/x/text v0.24.0 h1:dd5Bzh4yt5KYA8f9CJHCP4FB4D51c2c6JvN37xJJkJ0=
-golang.org/x/text v0.24.0/go.mod h1:L8rBsPeo2pSS+xqN0d5u2ikmjtmoJbDBT1b7nHvFCdU=
+golang.org/x/text v0.25.0 h1:qVyWApTSYLk/drJRO5mDlNYskwQznZmkpV2c8q9zls4=
+golang.org/x/text v0.25.0/go.mod h1:WEdwpYrmk1qmdHvhkSTNPm3app7v4rsT8F2UD6+VHIA=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
diff --git a/internal/config/load.go b/internal/config/load.go
index 77f53356b1e529cb5592366e1f2f3a8d757a315f..6e7b9971ed7e13d0f6d58b7a00b0a4d0d7545d82 100644
--- a/internal/config/load.go
+++ b/internal/config/load.go
@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"io"
 	"log/slog"
+	"maps"
 	"os"
 	"path/filepath"
 	"runtime"
@@ -135,6 +136,14 @@ func (c *Config) configureProviders(env env.Env, resolver VariableResolver, know
 				p.Models = models
 			}
 		}
+
+		headers := map[string]string{}
+		if len(p.DefaultHeaders) > 0 {
+			maps.Copy(headers, p.DefaultHeaders)
+		}
+		if len(config.ExtraHeaders) > 0 {
+			maps.Copy(headers, config.ExtraHeaders)
+		}
 		prepared := ProviderConfig{
 			ID:           string(p.ID),
 			Name:         p.Name,
@@ -142,7 +151,7 @@ func (c *Config) configureProviders(env env.Env, resolver VariableResolver, know
 			APIKey:       p.APIKey,
 			Type:         p.Type,
 			Disable:      config.Disable,
-			ExtraHeaders: config.ExtraHeaders,
+			ExtraHeaders: headers,
 			ExtraBody:    config.ExtraBody,
 			ExtraParams:  make(map[string]string),
 			Models:       p.Models,
diff --git a/internal/llm/provider/provider.go b/internal/llm/provider/provider.go
index c236c10f0b0e9bf9b4db50544ca664291ef13b65..4ea9566cbadb9571f62302e888bb0013e21a39bb 100644
--- a/internal/llm/provider/provider.go
+++ b/internal/llm/provider/provider.go
@@ -199,12 +199,6 @@ func NewProvider(cfg config.ProviderConfig, opts ...ProviderClientOption) (Provi
 			options: clientOptions,
 			client:  newVertexAIClient(clientOptions),
 		}, nil
-	case catwalk.TypeXAI:
-		clientOptions.baseURL = "https://api.x.ai/v1"
-		return &baseProvider[OpenAIClient]{
-			options: clientOptions,
-			client:  newOpenAIClient(clientOptions),
-		}, nil
 	}
 	return nil, fmt.Errorf("provider not supported: %s", cfg.Type)
 }