Gemini 3.8 Flash vs Grok 4.3
Compare Gemini 3.8 Flash vs Grok 4.3 API pricing, token costs, context windows, and latency. See which model is cheaper and better for your stack.
Gemini 3.8 Flash charges $0.75/1M input and $3.75/1M output tokens, compared to Grok 4.3 at $1.25/1M input and $2.50/1M output. Gemini 3.8 Flash is 1.7x cheaper on input tokens. In reasoning benchmarks, Gemini 3.8 Flash holds the higher AA Intelligence Index rating. For latency-critical streaming, Gemini 3.8 Flash delivers 113 t/s (20.0s TTFT) while Grok 4.3 provides 79 t/s (23.0s TTFT).
Full Metric & Specification Comparison
| Metric | Gemini 3.8 Flash | Grok 4.3 | Advantage |
|---|---|---|---|
| Provider | xAI | - | |
| Input Token Cost (1M) | $0.750 | $1.250 | Gemini 3.8 Flash |
| Output Token Cost (1M) | $3.750 | $2.500 | Grok 4.3 |
| Context Window | 1,000k tokens | 1,000k tokens | Tie |
| AA Intelligence Index | 31/100 | Unrated | Unrated |
| Streaming Latency | Fast | Moderate | - |
Key Architectural Takeaways
- Input Token Cost: Gemini 3.8 Flash is $0.75/1M vs Grok 4.3 at $1.25/1M
- Output Token Cost: Gemini 3.8 Flash is $3.75/1M vs Grok 4.3 at $2.50/1M
- Context Window: Gemini 3.8 Flash supports 1,000k tokens vs Grok 4.3 with 1,000k tokens
- Benchmark Intelligence Rating: not rated for one or both models
- Inference Latency: Gemini 3.8 Flash is rated Fast vs Grok 4.3 rated Moderate
Calculate Your Team's Exact Bill Difference
Drag the sliders below to see real-time cost divergences based on your daily token consumption.
Deploying Grok 4.3 over Gemini 3.8 Flash saves $1.88/mo ($23/yr) at this volume.
Frequently Asked Questions
Is Gemini 3.8 Flash cheaper than Grok 4.3?
Gemini 3.8 Flash is significantly more economical, charging $0.75/1M input compared to $1.25/1M for Grok 4.3.
Which model should I choose for production?
If your primary constraint is API cost and high query throughput, choose Gemini 3.8 Flash. If you require peak reasoning accuracy and complex tool use, Gemini 3.8 Flash is recommended.
How does context window compare between Gemini 3.8 Flash and Grok 4.3?
Gemini 3.8 Flash offers the larger context window (1,000k tokens), allowing you to pass significantly larger codebases or documents without chunking.
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