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Gemini 3.7 Flash vs GPT-4.5

Gemini 3.7 Flash significantly outperforms across most benchmarks. Gemini 3.7 Flash is 62.5x cheaper per token.

Google · OpenAI · Updated for 2026

Which is better?

Gemini 3.7 Flash outperforms in 1 benchmarks (CharXiv-R), while GPT-4.5 is better at 0 benchmarks. Gemini 3.7 Flash significantly outperforms across most benchmarks.

On price, Gemini 3.7 Flash is roughly 62.5x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Gemini 3.7 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 benchmark, pricing, and model metadata for 2026.

Choose Gemini 3.7 Flash

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • cost matters — it's about 62.5x 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 Aug 2026

Choose GPT-4.5

  • you want predictable pricing at $75.00/M input and $150.00/M output

At a glance

The differences that matter most.

Gemini 3.7 Flash
Google
GPT-4.5
OpenAI
Benchmark wins
1 of 1
0 of 1
Input price
$0.75 / M
$75.00 / M
Output price
$3.75 / M
$150.00 / M
Context window
1,048,576
128,000
Released
Aug 2026
Feb 2025
License
Proprietary
Proprietary

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Gemini 3.7 Flash outperforms in 1 benchmarks (CharXiv-R), while GPT-4.5 is better at 0 benchmarks.

Gemini 3.7 Flash significantly outperforms across most benchmarks.

Mon Aug 24 2026 • llm-stats.com

Arena Performance

Playground indexes and blind preference scores

Pricing Analysis

Price comparison per million tokens

Gemini 3.7 Flash costs less

For input processing, Gemini 3.7 Flash ($0.75/1M tokens) is 100.0x cheaper than GPT-4.5 ($75.00/1M tokens).

For output processing, Gemini 3.7 Flash ($3.75/1M tokens) is 40.0x cheaper than GPT-4.5 ($150.00/1M tokens).

In conclusion, GPT-4.5 is more expensive than Gemini 3.7 Flash.*

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

Lowest available price from all providers
Mon Aug 24 2026 • llm-stats.com
Google
Gemini 3.7 Flash
Input tokens$0.75
Output tokens$3.75
Best providerGoogle
OpenAI
GPT-4.5
Input tokens$75.00
Output tokens$150.00
Best providerOpenAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Gemini 3.7 Flash accepts 1,048,576 input tokens compared to GPT-4.5's 128,000 tokens. Gemini 3.7 Flash can generate longer responses up to 65,536 tokens, while GPT-4.5 is limited to 4,096 tokens.

Google
Gemini 3.7 Flash
Input1,048,576 tokens
Output65,536 tokens
OpenAI
GPT-4.5
Input128,000 tokens
Output4,096 tokens
Mon Aug 24 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 3.7 Flash and GPT-4.5 support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Gemini 3.7 Flash

Text
Images
Audio
Video

GPT-4.5

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 3.7 Flash

Proprietary

Closed source

GPT-4.5

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3.7 Flash was released on 2026-08-13, while GPT-4.5 was released on 2025-02-27.

Gemini 3.7 Flash is 18 months newer than GPT-4.5.

Gemini 3.7 Flash

Aug 13, 2026

1 weeks ago

1.5yr newer
GPT-4.5

Feb 27, 2025

1.5 years ago

Knowledge Cutoff

When training data ends

Gemini 3.7 Flash has a documented knowledge cutoff of 2026-03-31, while GPT-4.5's cutoff date is not specified.

We can confirm Gemini 3.7 Flash's training data extends to 2026-03-31, but cannot make a direct comparison without GPT-4.5's cutoff date.

Gemini 3.7 Flash

Mar 2026

GPT-4.5

—

Provider Availability

Gemini 3.7 Flash is available from Google. GPT-4.5 is available from OpenAI.

Gemini 3.7 Flash

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

GPT-4.5

openai logo
OpenAI
Input Price:Input: $75.00/1MOutput Price:Output: $150.00/1M
* 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 3.7 Flash and GPT-4.5 side-by-side, then vote on the output you prefer.

Gemini 3.7 Flash
✓ Preferred
GPT-4.5
Open in Playground

FAQ

Common questions about Gemini 3.7 Flash vs GPT-4.5.

Which is better, Gemini 3.7 Flash or GPT-4.5?

Gemini 3.7 Flash significantly outperforms across most benchmarks. Gemini 3.7 Flash is made by Google and GPT-4.5 is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Gemini 3.7 Flash compare to GPT-4.5 in benchmarks?

Gemini 3.7 Flash scores MRCR v2 (8-needle): 97.0%, Harvey LAB-AA: 90.7%, CharXiv-R: 88.7%, Terminal-Bench 2.1: 85.8%, LVBench: 85.4%. GPT-4.5 scores GSM8k: 97.0%, MMLU: 90.8%, CharXiv-D: 90.0%, IFEval: 88.2%, HumanEval: 88.0%.

Is Gemini 3.7 Flash cheaper than GPT-4.5?

Gemini 3.7 Flash is 100.0x cheaper for input tokens. Gemini 3.7 Flash costs $0.75/M input and $3.75/M output via google. GPT-4.5 costs $75.00/M input and $150.00/M output via openai.

What are the context window sizes for Gemini 3.7 Flash and GPT-4.5?

Gemini 3.7 Flash supports 1.0M tokens and GPT-4.5 supports 128K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Gemini 3.7 Flash and GPT-4.5?

Key differences include context window (1.0M vs 128K), input pricing ($0.75 vs $75.00/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3.7 Flash and GPT-4.5?

Gemini 3.7 Flash is developed by Google and GPT-4.5 is developed by OpenAI.

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