Gemini 3.8 Flash vs Grok 4.7: pricing and benchmarks
Gemini 3.8 Flash is 63% cheaper on input tokens ($0.75 vs $2.00 per 1M). Gemini 3.8 Flash is 38% cheaper on output tokens ($3.75 vs $6.00 per 1M). On our document Q&A workload (50,000 questions a month), Gemini 3.8 Flash costs $412.50 a month versus $980.00 for Grok 4.7, 58% less. Epoch AI has not published a capability index score for Grok 4.7 yet.
Prices verified September 26, 2026.
Which should you choose?
Epoch AI has not published a capability index score for Grok 4.7 yet.
Gemini 3.8 Flash costs $1.50 per 1M tokens (3:1 input-to-output mix) vs $3.00 for Grok 4.7, 50% less.
Pricing and specs
| Gemini 3.8 Flash | Grok 4.7 | |
|---|---|---|
| Provider | xAI | |
| API model ID | gemini-3.8-flash | grok-4.7 |
| Input / 1M tokens | $0.75 | $2.00 |
| Cached input / 1M tokens | $0.075 | $0.50 |
| Output / 1M tokens | $3.75 | $6.00 |
| Long-context rates | — | $4.00 in / $12.00 out above 200K prompt tokens |
| Context window | 1.05M tokens | 500K tokens |
| Max output | 66K tokens | — |
| Batch discount | 50% off | — |
Benchmarks
| Gemini 3.8 Flash | Grok 4.7 | |
|---|---|---|
| Epoch Capabilities Index | 156.5 | — |
| GPQA Diamond· Science reasoning | 93.9% | — |
| FrontierMath (Tiers 1–3)· Advanced math | 68.4% | — |
| SimpleQA Verified· Factual accuracy | 69.7% | — |
| ARC-AGI-2· Abstract reasoning | — | — |
| DeepSWE· Coding | 73.8% | — |
| APEX-Agents· Agentic work | — | — |
Source: Epoch AI, best recorded result per model (CC BY 4.0). A dash means no published score. See all benchmarks
Monthly cost for real workloads
| Workload | Gemini 3.8 Flash | Grok 4.7 | Difference |
|---|---|---|---|
Support chatbot 100,000 replies a month, ~1,500 input tokens (system prompt + history) and ~400 output tokens each. | $262.50 | $540.00 | Gemini 3.8 Flash 51% cheaper |
Document Q&A (RAG) 50,000 questions a month with ~8,000 tokens of retrieved context and ~600 output tokens each. | $412.50 | $980.00 | Gemini 3.8 Flash 58% cheaper |
Coding agent 10,000 agent steps a month, ~40,000 input tokens each (70% read from the prompt cache) and ~2,000 output tokens. | $186.00 | $500.00 | Gemini 3.8 Flash 63% cheaper |
Estimates use standard list prices and ignore cache-write surcharges. Different tokenizers can count the same text differently, so test with your own prompts.
Gemini 3.8 Flash vs Grok 4.7 cost calculator
- $412.50/mo$0.0083 / request
- Grok 4.7xAI$980.00/mo$0.02 / request
Standard-tier list prices. Long-context rates apply automatically where the provider publishes a threshold. Excludes cache-write surcharges, taxes, batch and volume discounts.
Gemini 3.8 Flash pricing notes
Google’s newest Flash model, with thinking, tool use and a 1M-token context window.
- Introductory price through December 31, 2026. From January 1, 2027: $1.50 input, $0.15 cached, $7.50 output per 1M tokens.
- Output price includes thinking tokens.
- Priority inference costs 1.8x the standard rate.
Grok 4.7 pricing notes
xAI’s newest flagship for coding and general use, with agentic tool calling and configurable reasoning.
- Requests with 200K or more prompt tokens are billed at $4 input / $1 cached / $12 output for all tokens.
- Web Search costs $5 per 1,000 calls; X Search is billed per item fetched, at $5 per 1,000 posts and $10 per 1,000 user profiles.
Frequently asked questions
- Is Gemini 3.8 Flash cheaper than Grok 4.7?
- Gemini 3.8 Flash is 63% cheaper on input tokens ($0.75 vs $2.00 per 1M). Gemini 3.8 Flash is 38% cheaper on output tokens ($3.75 vs $6.00 per 1M). On our document Q&A workload (50,000 questions a month), Gemini 3.8 Flash costs $412.50 a month versus $980.00 for Grok 4.7, 58% less.
- Which is more capable, Gemini 3.8 Flash or Grok 4.7?
- Epoch AI has not published a capability index score for Grok 4.7 yet.
- How much does Gemini 3.8 Flash cost per 1M tokens?
- Gemini 3.8 Flash costs $0.75 per 1M input tokens and $3.75 per 1M output tokens, and $0.075 per 1M cached input tokens on Google’s standard tier.
- How much does Grok 4.7 cost per 1M tokens?
- Grok 4.7 costs $2.00 per 1M input tokens and $6.00 per 1M output tokens, and $0.50 per 1M cached input tokens on xAI’s standard tier.
- Which has the larger context window, Gemini 3.8 Flash or Grok 4.7?
- Gemini 3.8 Flash has the larger context window: 1.05M tokens versus 500K for Grok 4.7.