LIVE INTELLIGENCE · part of the Xentir AI Index

Claude 2.1 vs GPT-3.5 Turbo (Nov 2023)

Name: Claude 2.1 vs GPT-3.5 Turbo (Nov 2023) — benchmark results
Creator: Epoch AI
License: https://creativecommons.org/licenses/by/4.0/

Claude 2.1 · Anthropic, released 2023-11-21
GPT-3.5 Turbo (Nov 2023) · OpenAI, released 2023-11-06

“Epoch AI, 'AI Benchmarking Hub'. Published online at epoch.ai. Retrieved from 'https://epoch.ai/benchmarks' [online resource].” · epoch.ai/benchmarks · Licensed CC BY 4.0 · data last verified 2026-09-09 · Methodology · Data Sources

Claude 2.1 leads on more of the 2 benchmarks where both are measured — Claude 2.1 on 2. The remaining 7 of 9 tracked benchmarks cannot be compared: 2 have a result for only one of the two models, 5 for neither. Nothing on this page is estimated to fill those in.

Head-to-head

Measured on 2 of 9 tracked benchmarks for both models — Claude 2.1 leads on 2.

Benchmark	Claude 2.1	GPT-3.5 Turbo (Nov 2023)	Leads
Epoch Capabilities Index (ECI)	119.2	118.5	Claude 2.1
SWE-bench Verified	Not measured	Not measured	Not measured on both
GPQA Diamond	0.330	0.280	Claude 2.1
MATH Level 5	Not measured	0.159	Comparison unavailable — Claude 2.1 has no published result
OTIS Mock AIME 2024-2025	0.019	Not measured	Comparison unavailable — GPT-3.5 Turbo (Nov 2023) has no published result
FrontierMath	Not measured	Not measured	Not measured on both
FrontierMath Tier 4	Not measured	Not measured	Not measured on both
SimpleQA Verified	Not measured	Not measured	Not measured on both
Chess Puzzles	Not measured	Not measured	Not measured on both

Benchmark results measure specific tasks and should not be treated as a universal measure of model quality. A model with no row here for a benchmark has not been measured on it — that is left blank, never estimated.

What remains uncertain

Claude 2.1 has no published result on MATH Level 5.
GPT-3.5 Turbo (Nov 2023) has no published result on OTIS Mock AIME 2024-2025.
5 tracked benchmarks have no published result for either model.

A missing result means Xentir has not found one published by the source it cites, not that the model performs badly. See Data Sources.

Reference price

Per 1M tokens	Claude 2.1	GPT-3.5 Turbo (Nov 2023)
Output	—	$2.00

List price as published by the vendor. Xentir does not verify negotiated or enterprise rates, and price is not a measure of capability — see Data Sources.

Full profiles

Claude 2.1 → · GPT-3.5 Turbo (Nov 2023) → · the full AI Model Rankings table