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Gemini 3 Flash vs Gemini 3.1 Flash TTS

Pricing per million tokens, context window, capabilities — pulled from each provider's public docs. All 2 are available via the same AIgateway OpenAI-compatible endpoint; flip the model string to switch.

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Gemini 3 Flash
google/gemini-3-flash
Gemini 3.1 Flash TTS
google/gemini-3.1-flash-tts
Provider
Google
Google
Family
Gemini 3
Gemini 3
Modality
text
audio-tts
Context window
1,000,000 tok
Max output
8,192 tok
Released
2026-05-22
2026-05-22
License
Proprietary
Proprietary
Input price
$0.500 /1M
Output price
$3.00 /1M
Cache read
$0.050 /1M
Per 1K chars
$0.0000 /1K ch
Tools
yes
yes
Streaming
yes
Vision
yes
JSON mode
yes
yes
Reasoning
Prompt caching
yes
Batch API
Try it
Open in playground →
Open in playground →
Gemini 3 Flash
google/gemini-3-flash
Full spec →

Gemini 3 Flash is Google's fast multimodal model with frontier intelligence, superior search, and grounding capabilities.

Strengths
  • Near-free per token
  • Multi-modal native
  • 1M context
Use cases
High-volume ingestionCheap visionThrowaway drafts
Gemini 3.1 Flash TTS
google/gemini-3.1-flash-tts
Full spec →

Newest audio model from Google introduces granular audio tags that give you precise control to direct AI speech for expressive audio generation.

Strengths
  • Natural speech synthesis
Use cases
VoiceoversIVRAudiobooks

Benchmarks

Gemini 3 Flash
Gemini 3.1 Flash TTS
MMLU
82.3

Source: each provider's published benchmarks. Higher is better. Run an eval to compare on your own data.

Compare with another

Claude Haiku 4.5 vs Gemini 3 Flash
anthropic/claude-haiku-4.5 · google/gemini-3-flash
GPT-5.4 Mini vs Gemini 3 Flash
openai/gpt-5.4-mini · google/gemini-3-flash
O4-Mini vs Gemini 3 Flash
openai/o4-mini · google/gemini-3-flash
Gemini 3 Flash vs Gemini 3.1 Flash Lite
google/gemini-3-flash · google/gemini-3.1-flash-lite
SWITCH BETWEEN THEM

One key, all 2, one line different.

from openai import OpenAI

client = OpenAI(
    base_url="https://api.aigateway.sh/v1",
    api_key="sk-aig-...",
)

# Gemini 3 Flash
client.chat.completions.create(
    model="google/gemini-3-flash",
    messages=[{"role":"user","content":"hello"}],
)

# Gemini 3.1 Flash TTS
client.chat.completions.create(
    model="google/gemini-3.1-flash-tts",
    messages=[{"role":"user","content":"hello"}],
)
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