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Gemini 3.8 Flash vs O3

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 3.8 Flash
google/gemini-3.8-flash
O3
openai/o3
Provider
Google
OpenAI
Family
Gemini 3
o-series
Modality
text
text
Context window
1,048,576 tok
200,000 tok
Max output
65,536 tok
100,000 tok
Released
2026-09-04
2026-05-22
License
Proprietary
Open-weight
Input price
$0.750 /1M
$2.00 /1M
Output price
$3.75 /1M
$8.00 /1M
Tools
yes
Streaming
yes
yes
Vision
yes
JSON mode
yes
Reasoning
Prompt caching
Batch API
Try it
Open in playground →
Open in playground →
Gemini 3.8 Flash
google/gemini-3.8-flash
Full spec →

Our most intelligent Flash model, engineered for long-horizon software engineering, autonomous agents, and complex enterprise workflows.

Strengths
  • General-purpose chat
  • Long context
  • Tool use
Use cases
ChatbotsContent generationAgentic workflows
O3
openai/o3
Full spec →

o3 is OpenAI’s general-purpose reasoning model, balancing strong analytical performance with reasonable latency and cost.

Strengths
  • General-purpose chat
  • Long context
  • Tool use
Use cases
ChatbotsContent generationAgentic workflows

Compare with another

Claude Fable 5.1 vs Gemini 3.8 Flash
anthropic/claude-fable-5.1 · google/gemini-3.8-flash
Claude Fable 5.1 vs O3
anthropic/claude-fable-5.1 · openai/o3
Gemini 3.8 Flash vs Claude Opus 5
google/gemini-3.8-flash · anthropic/claude-opus-5
Gemini 3.8 Flash vs Grok 4.6
google/gemini-3.8-flash · xai/grok-4.6
Gemini 3.8 Flash vs Glm-5.3
google/gemini-3.8-flash · zai-org/glm-5.3
Gemini 3.8 Flash vs Kimi K3
google/gemini-3.8-flash · moonshot/kimi-k3
Gemini 3.8 Flash vs Qwen3.8 Max
google/gemini-3.8-flash · alibaba/qwen3.8-max
Gemini 3.8 Flash vs Qwen3.8-27b
google/gemini-3.8-flash · qwen/qwen3.8-27b
Gemini 3.8 Flash vs GPT-5.6 Sol
google/gemini-3.8-flash · openai/gpt-5.6-sol
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 3.8 Flash
client.chat.completions.create(
    model="google/gemini-3.8-flash",
    messages=[{"role":"user","content":"hello"}],
)

# O3
client.chat.completions.create(
    model="openai/o3",
    messages=[{"role":"user","content":"hello"}],
)
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