Model Comparison

GPT-3.5 Turbo vs Gemini 1.5 Flash 8BWhich is better in 2026?

Gemini 1.5 Flash 8B significantly outperforms across most benchmarks. Gemini 1.5 Flash 8B is 5.9x cheaper per token.

Verdict: GPT-3.5 Turbo vs Gemini 1.5 Flash 8B — which is better?

GPT-3.5 Turbo (by OpenAI) and Gemini 1.5 Flash 8B (by Google) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

GPT-3.5 Turbo outperforms in 0 benchmarks, while Gemini 1.5 Flash 8B is better at 4 benchmarks (GPQA, MATH, MathVista, MMMU). Gemini 1.5 Flash 8B significantly outperforms across most benchmarks.

On price, Gemini 1.5 Flash 8B is roughly 5.9x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Gemini 1.5 Flash 8B also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.

Choose GPT-3.5 Turbo if…

  • you want predictable pricing at $0.50/M input and $1.50/M output

Choose Gemini 1.5 Flash 8B if…

  • you want the strongest raw capability — it leads on 4 of 4 shared benchmarks
  • cost matters — it's about 5.9x cheaper per token
  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Mar 2024

Performance Benchmarks

Comparative analysis across standard metrics

4 benchmarks

GPT-3.5 Turbo outperforms in 0 benchmarks, while Gemini 1.5 Flash 8B is better at 4 benchmarks (GPQA, MATH, MathVista, MMMU).

Gemini 1.5 Flash 8B significantly outperforms across most benchmarks.

Thu Jul 02 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Gemini 1.5 Flash 8B costs less

For input processing, GPT-3.5 Turbo ($0.50/1M tokens) is 7.1x more expensive than Gemini 1.5 Flash 8B ($0.07/1M tokens).

For output processing, GPT-3.5 Turbo ($1.50/1M tokens) is 5.0x more expensive than Gemini 1.5 Flash 8B ($0.30/1M tokens).

In conclusion, GPT-3.5 Turbo is more expensive than Gemini 1.5 Flash 8B.*

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

Lowest available price from all providers
Thu Jul 02 2026 • llm-stats.com
OpenAI
GPT-3.5 Turbo
Input tokens$0.50
Output tokens$1.50
Best providerAzure
Google
Gemini 1.5 Flash 8B
Input tokens$0.07
Output tokens$0.30
Best providerGoogle
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Gemini 1.5 Flash 8B accepts 1,048,576 input tokens compared to GPT-3.5 Turbo's 16,385 tokens. Gemini 1.5 Flash 8B can generate longer responses up to 8,192 tokens, while GPT-3.5 Turbo is limited to 4,096 tokens.

OpenAI
GPT-3.5 Turbo
Input16,385 tokens
Output4,096 tokens
Google
Gemini 1.5 Flash 8B
Input1,048,576 tokens
Output8,192 tokens
Thu Jul 02 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Gemini 1.5 Flash 8B supports multimodal inputs, whereas GPT-3.5 Turbo does not.

Gemini 1.5 Flash 8B can handle both text and other forms of data like images, making it suitable for multimodal applications.

GPT-3.5 Turbo

Text
Images
Audio
Video

Gemini 1.5 Flash 8B

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.

GPT-3.5 Turbo

Proprietary

Closed source

Gemini 1.5 Flash 8B

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-3.5 Turbo was released on 2023-03-21, while Gemini 1.5 Flash 8B was released on 2024-03-15.

Gemini 1.5 Flash 8B is 12 months newer than GPT-3.5 Turbo.

GPT-3.5 Turbo

Mar 21, 2023

3.3 years ago

Gemini 1.5 Flash 8B

Mar 15, 2024

2.3 years ago

12mo newer

Knowledge Cutoff

When training data ends

GPT-3.5 Turbo has a knowledge cutoff of 2021-09-30, while Gemini 1.5 Flash 8B has a cutoff of 2024-10-01.

Gemini 1.5 Flash 8B has more recent training data (up to 2024-10-01), making it potentially better informed about events through that date compared to GPT-3.5 Turbo (2021-09-30).

GPT-3.5 Turbo

Sep 2021

Gemini 1.5 Flash 8B

Oct 2024

3.1 yr newer

Provider Availability

GPT-3.5 Turbo is available from Azure, OpenAI. Gemini 1.5 Flash 8B is available from Google.

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

Gemini 1.5 Flash 8B

google logo
Google
Input Price:Input: $0.07/1MOutput Price:Output: $0.30/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

OpenAI

No standout differentiators in the data we have for this pair.

Google
Larger context window (1,048,576 tokens)
Supports multimodal inputs
Less expensive input tokens
Less expensive output tokens
Higher GPQA score (38.4% vs 30.8%)
Higher MATH score (58.7% vs 43.1%)
Higher MathVista score (54.7% vs 0.0%)
Higher MMMU score (53.7% vs 0.0%)
OpenAIGPT-3.5 Turbo
GoogleGemini 1.5 Flash 8B
Compare in Playground

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against GPT-3.5 Turbo and Gemini 1.5 Flash 8B side-by-side, then vote on the output you prefer.

GPT-3.5 Turbo
✓ Preferred
Gemini 1.5 Flash 8B
Open in Playground
AI Model Comparison Table
Feature
OpenAI
GPT-3.5 Turbo
Google
Gemini 1.5 Flash 8B

FAQ

Common questions about GPT-3.5 Turbo vs Gemini 1.5 Flash 8B.

Which is better, GPT-3.5 Turbo or Gemini 1.5 Flash 8B?

Gemini 1.5 Flash 8B significantly outperforms across most benchmarks. GPT-3.5 Turbo is made by OpenAI and Gemini 1.5 Flash 8B is made by Google. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does GPT-3.5 Turbo compare to Gemini 1.5 Flash 8B in benchmarks?

GPT-3.5 Turbo scores DROP: 70.2%, MMLU: 69.8%, HumanEval: 68.0%, MGSM: 56.3%, MATH: 43.1%. Gemini 1.5 Flash 8B scores XSTest: 92.6%, FLEURS: 86.4%, Natural2Code: 75.5%, WMT23: 72.6%, Video-MME: 66.2%.

Is GPT-3.5 Turbo cheaper than Gemini 1.5 Flash 8B?

Gemini 1.5 Flash 8B is 7.1x cheaper for input tokens. GPT-3.5 Turbo costs $0.50/M input and $1.50/M output via azure. Gemini 1.5 Flash 8B costs $0.07/M input and $0.30/M output via google.

What are the context window sizes for GPT-3.5 Turbo and Gemini 1.5 Flash 8B?

GPT-3.5 Turbo supports 16K tokens and Gemini 1.5 Flash 8B supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between GPT-3.5 Turbo and Gemini 1.5 Flash 8B?

Key differences include context window (16K vs 1.0M), input pricing ($0.50 vs $0.07/M), multimodal support (no vs yes). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-3.5 Turbo and Gemini 1.5 Flash 8B?

GPT-3.5 Turbo is developed by OpenAI and Gemini 1.5 Flash 8B is developed by Google.

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