diff --git a/pyproject.toml b/pyproject.toml
index edc9989..8a91fd4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "agent-eval"
-version = "0.1.50"
+version = "0.1.51"
 description = "Agent evaluation toolkit"
 readme = "README.md"
 requires-python = ">=3.10"
@@ -14,7 +14,7 @@ dependencies = [
   "inspect-ai==0.3.203",
   # pin litellm so that we know what model costs we're using
   # see the Development.md doc before changing
-  "litellm>=1.67.4.post1,<=1.83.13",
+  "litellm>=1.67.4.post1,<=1.88.1",
   "pydantic>=2.0.0",
   # For leaderboard
   "huggingface_hub",
diff --git a/src/agenteval/cli.py b/src/agenteval/cli.py
index f4adafa..d7a6e9c 100644
--- a/src/agenteval/cli.py
+++ b/src/agenteval/cli.py
@@ -160,7 +160,9 @@ def prep_litellm_cost_map():
     # This snippet is mostly lifted from
     # https://github.com/BerriAI/litellm/blob/b9621c760d3355e06dd17ec89b9eb6776755392e/litellm/litellm_core_utils/get_model_cost_map.py#L16
     # See the Development.md before changing.
-    desired_model_costs_url = "https://raw.githubusercontent.com/BerriAI/litellm/319193604cfccb1092a17f58ec4ca049115da446/litellm/model_prices_and_context_window_backup.json"
+    # SHA below is the v1.88.1 release tag of BerriAI/litellm (upper bound of the
+    # litellm pin in pyproject.toml); keep the two in sync when bumping.
+    desired_model_costs_url = "https://raw.githubusercontent.com/BerriAI/litellm/9c117a58be8fb8066e833aa92dd98fdf15771e50/litellm/model_prices_and_context_window_backup.json"
     response = httpx.get(desired_model_costs_url, timeout=5)
     response.raise_for_status()
     desired_model_costs = response.json()