GPT-3.5 Turbo vs Muse Spark Open
Muse Spark Open leads the LLM Stats Score 44.9 to -9.7. GPT-3.5 Turbo is 2.7x cheaper per token.
OpenAI · Meta · Updated for 2026
Which is better?
Muse Spark Open leads the overall LLM Stats Score 44.9 to -9.7, ranking #43 overall.
In the 1 individual benchmarks reported for both models, Muse Spark Open wins 1; this is a narrower head-to-head signal than the composite indexes.
On price, GPT-3.5 Turbo is roughly 2.7x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Muse Spark Open also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose GPT-3.5 Turbo
- cost matters — it's about 2.7x cheaper per token
Choose Muse Spark Open
- overall performance matters — it scores 44.9 and ranks #43 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you value its reported benchmark strengths — it wins 1 of 1 exact shared results
- you process long inputs — it offers a 1,048,576 token context window
- you want the most recent training data — it shipped Oct 2026
- you need open weights you can self-host or fine-tune
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
8 reported for GPT-3.5 Turbo · 17 for Muse Spark Open
GPT-3.5 Turbo outperforms in 0 benchmarks, while Muse Spark Open is better at 1 benchmark (GPQA).
Muse Spark Open significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-3.5 Turbo ($0.50/1M tokens) is 2.5x cheaper than Muse Spark Open ($1.25/1M tokens).
For output processing, GPT-3.5 Turbo ($1.50/1M tokens) is 2.8x cheaper than Muse Spark Open ($4.25/1M tokens).
In conclusion, Muse Spark Open is more expensive than GPT-3.5 Turbo.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Muse Spark Open accepts 1,048,576 input tokens compared to GPT-3.5 Turbo's 16,385 tokens. Muse Spark Open can generate longer responses up to 1,048,576 tokens, while GPT-3.5 Turbo is limited to 4,096 tokens.
Input capabilities
Documented input modalities across available providers
Muse Spark Open supports multimodal inputs, whereas GPT-3.5 Turbo does not.
Muse Spark Open can handle both text and other forms of data like images, making it suitable for multimodal applications.
GPT-3.5 Turbo
Muse Spark Open
License
Usage and distribution terms
GPT-3.5 Turbo is licensed under a proprietary license, while Muse Spark Open uses Muse Model License.
License differences may affect how you can use these models in commercial or open-source projects.
Proprietary
Closed source
Muse Model License
Open weights
Release Timeline
When each model was launched
GPT-3.5 Turbo was released on 2023-03-21, while Muse Spark Open was released on 2026-10-15.
Muse Spark Open is 43 months newer than GPT-3.5 Turbo.
Mar 21, 2023
3.6 years ago
Oct 15, 2026
5 days ago
3.6yr newerKnowledge Cutoff
When training data ends
GPT-3.5 Turbo has a documented knowledge cutoff of 2021-09-30, while Muse Spark Open's cutoff date is not specified.
We can confirm GPT-3.5 Turbo's training data extends to 2021-09-30, but cannot make a direct comparison without Muse Spark Open's cutoff date.
Sep 2021
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Provider Availability
GPT-3.5 Turbo is available from Azure, OpenAI. Muse Spark Open is available from Together.
GPT-3.5 Turbo
Muse Spark Open
Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-3.5 Turbo and Muse Spark Open side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-3.5 Turbo vs Muse Spark Open.