Gemini 2.5 Flash vs Grok 4.3
Benchmarks, API pricing and specs, head to head. Data updated 2026-06-10.
Gemini 2.5 Flash
Google · Jun 2025
The 2025 fast-tier favorite: hybrid reasoning, full multimodality and a 1M context at $0.30/$2.50.
Grok 4.3
xAI · Apr 2026
xAI's frontier model: 1M context at $1.25/$2.50, ~168 tokens/sec, and a record low hallucination rate on independent testing.
The verdict
These two models don't yet share verified results on the benchmarks we track, so judge them on specs, pricing and intended use. Gemini 2.5 Flash is about 1.8x cheaper per blended million tokens (3:1 input:output mix). Gemini 2.5 Flash also takes 1.0M of context versus 1M for Grok 4.3.
Specs & pricing
| Gemini 2.5 Flash | Grok 4.3 | |
|---|---|---|
| modhub Index | — | — |
| Input price / 1M | $0.3 | $1.25 |
| Output price / 1M | $2.5 | $2.5 |
| Context window | 1.0M | 1M |
| Max output | 66K | — |
| Open weights | no | no |
| Reasoning model | yes | yes |
| Multimodal input | text, image, audio, video | text, image |
| Knowledge cutoff | Jan 2025 | Mar 2026 |
| Released | Jun 2025 | Apr 2026 |
| Example monthly cost* | $6.75 | $16.25 |
* 10M input + 1.5M output tokens per month at list prices, no caching. Green = better value on that row.
Frequently asked questions
- Which is better, Gemini 2.5 Flash or Grok 4.3?
- These two models don't yet share verified results on the benchmarks we track, so judge them on specs, pricing and intended use. Gemini 2.5 Flash is about 1.8x cheaper per blended million tokens (3:1 input:output mix). Gemini 2.5 Flash also takes 1.0M of context versus 1M for Grok 4.3.
- Which is cheaper, Gemini 2.5 Flash or Grok 4.3?
- Gemini 2.5 Flash costs $0.3/$2.5 per million input/output tokens, while Grok 4.3 costs $1.25/$2.5. For a typical workload of 10M input and 1.5M output tokens per month, that's $6.75 versus $16.25.
- Which model is better for coding, Gemini 2.5 Flash or Grok 4.3?
- We don't yet track SWE-bench Verified results for both models; check their individual pages for coding-related scores.