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Gemini 3.8 Flash vs GPT-3.5 Turbo

Gemini 3.8 Flash leads the LLM Stats Score 51.8 to -9.2. GPT-3.5 Turbo is 2.0x cheaper per token.

Google · OpenAI · Updated for 2026

Which is better?

Gemini 3.8 Flash leads the overall LLM Stats Score 51.8 to -9.2, ranking #11 overall.

On price, GPT-3.5 Turbo is roughly 2.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Gemini 3.8 Flash 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 Gemini 3.8 Flash

  • overall performance matters — it scores 51.8 and ranks #11 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Sep 2026

Choose GPT-3.5 Turbo

  • cost matters — it's about 2.0x cheaper per token

At a glance

The differences that matter most.

Gemini 3.8 Flash
Google
GPT-3.5 Turbo
OpenAI
Core performance indexes
LLM Stats Score
51.8
#11
-9.2
#350
Reasoning
47.6
#21
-8.5
#342
Coding
41.3
#10
-4.4
#247
Cost, coverage & limits
Benchmark wins
—
—
Input price
$0.75 / M
$0.50 / M
Output price
$3.75 / M
$1.50 / M
Context window
1,048,576
16,385

Capability indexes

Additional strengths measured across groups of related public benchmarks

2 shared
Index
Gemini 3.8 Flash
GPT-3.5 Turbo
Vision
34.4#11
-15.9#202
Multimodal
35.3#10
-14.1#162
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

13 reported for Gemini 3.8 Flash · 8 for GPT-3.5 Turbo

No common benchmarks found

Gemini 3.8 Flash and GPT-3.5 Turbodon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

GPT-3.5 Turbo costs less

For input processing, Gemini 3.8 Flash ($0.75/1M tokens) is 1.5x more expensive than GPT-3.5 Turbo ($0.50/1M tokens).

For output processing, Gemini 3.8 Flash ($3.75/1M tokens) is 2.5x more expensive than GPT-3.5 Turbo ($1.50/1M tokens).

In conclusion, Gemini 3.8 Flash is more expensive than GPT-3.5 Turbo.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Wed Sep 02 2026 • llm-stats.com
Google
Gemini 3.8 Flash
Input tokens$0.75
Output tokens$3.75
Best providerGoogle
OpenAI
GPT-3.5 Turbo
Input tokens$0.50
Output tokens$1.50
Best providerAzure
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Gemini 3.8 Flash accepts 1,048,576 input tokens compared to GPT-3.5 Turbo's 16,385 tokens. Gemini 3.8 Flash can generate longer responses up to 65,536 tokens, while GPT-3.5 Turbo is limited to 4,096 tokens.

Google
Gemini 3.8 Flash
Input1,048,576 tokens
Output65,536 tokens
OpenAI
GPT-3.5 Turbo
Input16,385 tokens
Output4,096 tokens
Wed Sep 02 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Gemini 3.8 Flash supports multimodal inputs, whereas GPT-3.5 Turbo does not.

Gemini 3.8 Flash can handle both text and other forms of data like images, making it suitable for multimodal applications.

Gemini 3.8 Flash

Text
Images
Audio
Video

GPT-3.5 Turbo

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Gemini 3.8 Flash

Proprietary

Closed source

GPT-3.5 Turbo

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3.8 Flash was released on 2026-09-02, while GPT-3.5 Turbo was released on 2023-03-21.

Gemini 3.8 Flash is 42 months newer than GPT-3.5 Turbo.

Gemini 3.8 Flash

Sep 2, 2026

0 days ago

3.5yr newer
GPT-3.5 Turbo

Mar 21, 2023

3.5 years ago

Knowledge Cutoff

When training data ends

Gemini 3.8 Flash has a knowledge cutoff of 2026-03-31, while GPT-3.5 Turbo has a cutoff of 2021-09-30.

Gemini 3.8 Flash has more recent training data (up to 2026-03-31), making it potentially better informed about events through that date compared to GPT-3.5 Turbo (2021-09-30).

Gemini 3.8 Flash

Mar 2026

4.5 yr newer
GPT-3.5 Turbo

Sep 2021

Provider Availability

Gemini 3.8 Flash is available from Google. GPT-3.5 Turbo is available from Azure, OpenAI.

Gemini 3.8 Flash

google logo
Google
Input Price:Input: $0.75/1MOutput Price:Output: $3.75/1M

GPT-3.5 Turbo

azure logo
Azure
Input Price:Input: $0.50/1MOutput Price:Output: $1.50/1M
openai logo
OpenAI
Input Price:Input: $0.50/1MOutput Price:Output: $1.50/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Gemini 3.8 Flash and GPT-3.5 Turbo side-by-side, then vote on the output you prefer.

Gemini 3.8 Flash
✓ Preferred
GPT-3.5 Turbo
Open in Playground

FAQ

Common questions about Gemini 3.8 Flash vs GPT-3.5 Turbo.

Which is better, Gemini 3.8 Flash or GPT-3.5 Turbo?

Gemini 3.8 Flash leads the LLM Stats Score 51.8 to -9.2. Gemini 3.8 Flash is made by Google and GPT-3.5 Turbo is made by OpenAI. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Gemini 3.8 Flash compare to GPT-3.5 Turbo in benchmarks?

Gemini 3.8 Flash scores Terminal-Bench 2.1: 89.4%, LVBench: 87.1%, CharXiv-R: 86.2%, LABBench2: 86.2%, DeepSWE 1.1: 73.7%. GPT-3.5 Turbo scores DROP: 70.2%, MMLU: 69.8%, HumanEval: 68.0%, MGSM: 56.3%, MATH: 43.1%.

Is Gemini 3.8 Flash cheaper than GPT-3.5 Turbo?

GPT-3.5 Turbo is 1.5x cheaper for input tokens. Gemini 3.8 Flash costs $0.75/M input and $3.75/M output via google. GPT-3.5 Turbo costs $0.50/M input and $1.50/M output via azure.

What are the context window sizes for Gemini 3.8 Flash and GPT-3.5 Turbo?

Gemini 3.8 Flash supports 1.0M tokens and GPT-3.5 Turbo supports 16K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Gemini 3.8 Flash and GPT-3.5 Turbo?

Key differences include LLM Stats Score (51.8 vs -9.2), context window (1.0M vs 16K), input pricing ($0.75 vs $0.50/M), multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3.8 Flash and GPT-3.5 Turbo?

Gemini 3.8 Flash is developed by Google and GPT-3.5 Turbo is developed by OpenAI.

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