diff --git a/Cargo.lock b/Cargo.lock
index 8b5ad1b64a..fb3e154d28 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -240,9 +240,9 @@ checksum = "e78f17bacc1bc7b91fef7b1885c10772eb2b9e4e989356f6f0f6a972240f97cd"
 
 [[package]]
 name = "anyhow"
-version = "1.0.75"
+version = "1.0.83"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a4668cab20f66d8d020e1fbc0ebe47217433c1b6c8f2040faf858554e394ace6"
+checksum = "25bdb32cbbdce2b519a9cd7df3a678443100e265d5e25ca763b7572a5104f5f3"
 
 [[package]]
 name = "approx"
@@ -1301,7 +1301,7 @@ checksum = "3b829e4e32b91e643de6eafe82b1d90675f5874230191a4ffbc1b336dec4d6bf"
 dependencies = [
  "async-trait",
  "axum-core",
- "base64 0.21.4",
+ "base64 0.21.7",
  "bitflags 1.3.2",
  "bytes 1.5.0",
  "futures-util",
@@ -1396,9 +1396,9 @@ checksum = "9e1b586273c5702936fe7b7d6896644d8be71e6314cfe09d3167c95f712589e8"
 
 [[package]]
 name = "base64"
-version = "0.21.4"
+version = "0.21.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9ba43ea6f343b788c8764558649e08df62f86c6ef251fdaeb1ffd010a9ae50a2"
+checksum = "9d297deb1925b89f2ccc13d7635fa0714f12c87adce1c75356b39ca9b7178567"
 
 [[package]]
 name = "base64"
@@ -3836,9 +3836,9 @@ checksum = "2acce4a10f12dc2fb14a218589d4f1f62ef011b2d0cc4b3cb1bba8e94da14649"
 
 [[package]]
 name = "fancy-regex"
-version = "0.11.0"
+version = "0.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b95f7c0680e4142284cf8b22c14a476e87d61b004a3a0861872b32ef7ead40a2"
+checksum = "7493d4c459da9f84325ad297371a6b2b8a162800873a22e3b6b6512e61d18c05"
 dependencies = [
  "bit-set",
  "regex",
@@ -4854,7 +4854,7 @@ version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "06683b93020a07e3dbcf5f8c0f6d40080d725bea7936fc01ad345c01b97dc270"
 dependencies = [
- "base64 0.21.4",
+ "base64 0.21.7",
  "bytes 1.5.0",
  "headers-core",
  "http 0.2.9",
@@ -7384,7 +7384,7 @@ version = "1.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9a4a0cfc5fb21a09dc6af4bf834cf10d4a32fccd9e2ea468c4b1751a097487aa"
 dependencies = [
- "base64 0.21.4",
+ "base64 0.21.7",
  "indexmap 1.9.3",
  "line-wrap",
  "quick-xml 0.30.0",
@@ -8184,7 +8184,7 @@ version = "0.11.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3e9ad3fe7488d7e34558a2033d45a0c90b72d97b4f80705666fea71472e2e6a1"
 dependencies = [
- "base64 0.21.4",
+ "base64 0.21.7",
  "bytes 1.5.0",
  "encoding_rs",
  "futures-core",
@@ -8566,7 +8566,7 @@ version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2d3987094b1d07b653b7dfdc3f70ce9a1da9c51ac18c1b06b662e4f9a0e9f4b2"
 dependencies = [
- "base64 0.21.4",
+ "base64 0.21.7",
 ]
 
 [[package]]
@@ -9577,7 +9577,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "864b869fdf56263f4c95c45483191ea0af340f9f3e3e7b4d57a61c7c87a970db"
 dependencies = [
  "atoi",
- "base64 0.21.4",
+ "base64 0.21.7",
  "bigdecimal",
  "bitflags 2.4.2",
  "byteorder",
@@ -9624,7 +9624,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "eb7ae0e6a97fb3ba33b23ac2671a5ce6e3cabe003f451abd5a56e7951d975624"
 dependencies = [
  "atoi",
- "base64 0.21.4",
+ "base64 0.21.7",
  "bigdecimal",
  "bitflags 2.4.2",
  "byteorder",
@@ -10346,12 +10346,12 @@ dependencies = [
 
 [[package]]
 name = "tiktoken-rs"
-version = "0.5.7"
+version = "0.5.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a4427b6b1c6b38215b92dd47a83a0ecc6735573d0a5a4c14acc0ac5b33b28adb"
+checksum = "c314e7ce51440f9e8f5a497394682a57b7c323d0f4d0a6b1b13c429056e0e234"
 dependencies = [
  "anyhow",
- "base64 0.21.4",
+ "base64 0.21.7",
  "bstr",
  "fancy-regex",
  "lazy_static",
diff --git a/Cargo.toml b/Cargo.toml
index b4745c2ffb..84d0010f38 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -337,7 +337,7 @@ subtle = "2.5.0"
 sysinfo = "0.30.7"
 tempfile = "3.9.0"
 thiserror = "1.0.29"
-tiktoken-rs = "0.5.7"
+tiktoken-rs = "0.5.9"
 time = { version = "0.3", features = [
     "macros",
     "parsing",
diff --git a/crates/assistant/src/completion_provider/open_ai.rs b/crates/assistant/src/completion_provider/open_ai.rs
index b456f3e08a..536ce88837 100644
--- a/crates/assistant/src/completion_provider/open_ai.rs
+++ b/crates/assistant/src/completion_provider/open_ai.rs
@@ -204,9 +204,7 @@ pub fn count_open_ai_tokens(
                 .collect::<Vec<_>>();
 
             match request.model {
-                LanguageModel::OpenAi(OpenAiModel::FourOmni)
-                | LanguageModel::ZedDotDev(ZedDotDevModel::Gpt4Omni)
-                | LanguageModel::Anthropic(_)
+                LanguageModel::Anthropic(_)
                 | LanguageModel::ZedDotDev(ZedDotDevModel::Claude3Opus)
                 | LanguageModel::ZedDotDev(ZedDotDevModel::Claude3Sonnet)
                 | LanguageModel::ZedDotDev(ZedDotDevModel::Claude3Haiku) => {