Codex Mini vs Gemini 3.8 Live Extended Thinking
Pricing verdict: Codex Mini vs Gemini 3.8 Live Extended Thinking: Gemini 3.8 Live Extended Thinking is cheaper for input-heavy usage ($0.75/M vs $1.50/M input tokens), while Codex Mini is better for long-context tasks (200,000 tokens).
Direct answer: choose Gemini 3.8 Live Extended Thinking for lower token spend and choose Codex Mini when your workload needs longer context.
Compare API pricing, input and output token costs, context windows, and monthly estimates on one page so you can pick the right model fast.
Cost Comparison (1000 input + 500 output tokens, 100 requests/day)
Codex Mini
Gemini 3.8 Live Extended Thinking
Cost Differences
Gemini 3.8 Live Extended Thinking costs less than Codex Mini
Quick Recommendation
Winner for direct API pricing: Gemini 3.8 Live Extended Thinking. At the default workload, Gemini 3.8 Live Extended Thinking saves about $4.50/month ($54.75/year) versus Codex Mini.
Feature Comparison
| Feature | Codex Mini | Gemini 3.8 Live Extended Thinking |
|---|---|---|
| Provider | OpenAI | |
| Input Price | $1.50/1M tokens | $0.75/1M tokens |
| Output Price | $6.00/1M tokens | $4.50/1M tokens |
| Context Window | 200,000 tokens | 131,072 tokens |
| Max Output | 32,768 tokens | 65,536 tokens |
| Category | efficient | reasoning |
| Capabilities | textcodereasoning | textvisionaudiovideoreasoningstreaming |
| Release Date | 2/2/2026 | 9/15/2026 |
Codex Mini vs Gemini 3.8 Live Extended Thinking: Which Should You Choose?
Choosing between Codex Mini and Gemini 3.8 Live Extended Thinking depends on your priorities: cost efficiency, context length, or raw capability. Gemini 3.8 Live Extended Thinking is the more affordable option at $0.75/1M input tokens — 50% cheaper than Codex Mini. Meanwhile, Codex Mini offers a significantly larger context window at 200,000 tokens vs 131,072 for Gemini 3.8 Live Extended Thinking.
These models come from different providers — OpenAI and Google — which means different API ecosystems, SDKs, rate limits, and terms of service. If you're already integrated with OpenAI, switching to Googleinvolves migration effort beyond just pricing. Factor in your existing infrastructure when deciding.
These models target different tiers: Codex Mini is a efficient model while Gemini 3.8 Live Extended Thinking is reasoning. This means they're optimized for different workloads. Gemini 3.8 Live Extended Thinking targets more demanding workloads, while Codex Mini provides a cost-effective option for everyday tasks.
Output costs matter too. Codex Mini charges $6.00/1M output tokens vs $4.50 for Gemini 3.8 Live Extended Thinking. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. Gemini 3.8 Live Extended Thinking has the edge here at $4.50/1M output tokens.
Multimodal capabilities: Gemini 3.8 Live Extended Thinking supports vision (image inputs) while Codex Mini is text-only. If your application needs image understanding, this narrows your choice.
Best Use Cases
Choose Codex Mini when:
- • You need a larger context window (200,000 tokens)
- • You're already using OpenAI's API ecosystem
- • You're running high-volume, latency-sensitive workloads
Choose Gemini 3.8 Live Extended Thinking when:
- • Budget is a primary concern
- • You need more capabilities (vision, audio, video, streaming)
- • You need longer outputs (up to 65,536 tokens)
- • You're already using Google's API ecosystem
Pros and Caveats at a Glance
Codex Mini
- • Input pricing: $1.50/M tokens
- • Output pricing: $6.00/M tokens
- • Context window: 200,000 tokens
- • Max output: 32,768 tokens
Watch out for
- • Higher input cost than Gemini 3.8 Live Extended Thinking
- • Higher output cost than Gemini 3.8 Live Extended Thinking
Gemini 3.8 Live Extended Thinking
- • Input pricing: $0.75/M tokens
- • Output pricing: $4.50/M tokens
- • Context window: 131,072 tokens
- • Max output: 65,536 tokens
Watch out for
- • Smaller context window than Codex Mini
Try Different Scenarios
Use the calculator below to see how costs change with different usage patterns
Codex Mini (OpenAI)
Gemini 3.8 Live Extended Thinking (Google)
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Which is cheaper, Codex Mini or Gemini 3.8 Live Extended Thinking?▼
What is the context window difference between Codex Mini and Gemini 3.8 Live Extended Thinking?▼
Which model is better for AI Chatbot?▼
Which model has better overall pricing for heavy usage?▼
Where can I compare OpenAI and Google API pricing beyond this model matchup?▼
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