Model comparison
Gemini 2.5 Flash vs Grok 4.5
Head-to-head evidence from 11 shared benchmark results across 4 categories. Overall scores shown here use BenchLM's provisional ranking lane.
Evidence parity. Gemini 2.5 Flash and Grok 4.5 share 11 comparable benchmark results. 0 of 8 categories are comparable. 5 results are unique to Gemini 2.5 Flash; 16 to Grok 4.5.
Updated July 14, 2026- Shared results
- 11
- Gemini 2.5 Flash only
- 5
- Grok 4.5 only
- 16
- Comparable categories
- 0 / 8
Benchmark data for Gemini 2.5 Flash and Grok 4.5 is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 11 shared benchmark results across 4 evidence categories; 0 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
BenchLM has partial data for these models, but not enough overlapping benchmark coverage to produce a fair score-level comparison yet.
Grok 4.5 is priced at $2.00 input / $6.00 output per 1M tokens, versus $0.30 input / $2.50 output per 1M tokens for Gemini 2.5 Flash. Gemini 2.5 Flash has the larger context window at 1M, compared with 500K for Grok 4.5.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | Gemini 2.5 Flash | Δ | Grok 4.5 |
|---|---|---|---|
| Agentic | Gemini 2.5 FlashNot measured | MarginNo overlap | Grok 4.583.3 |
| Coding | Gemini 2.5 FlashNot measured | MarginNo overlap | Grok 4.564.7 |
| Math | Gemini 2.5 Flash4.7 | MarginNo overlap | Grok 4.5Not measured |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Gemini 2.5 Flash | Grok 4.5 | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Gemini 2.5 Flash$0.3 input / $2.5 output | Grok 4.5$2 input / $6 output | Gemini 2.5 Flash has the lower combined listed price. |
| Generation speedtokens per second | Gemini 2.5 Flash221 tok/s | Grok 4.5Not available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Gemini 2.5 Flash0.50 s | Grok 4.5Not available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Gemini 2.5 Flash1M | Grok 4.5500K | Gemini 2.5 Flash lists the larger context window. |
Benchmark Deep Dive
Agentic11 benchmarks
| Benchmark | Gemini 2.5 Flash | Grok 4.5 | Result |
|---|---|---|---|
| Tau2-TelecomSource | 14.9% | — | Not comparable |
| Terminal-Bench 2.0Source | — | 83.3% | Not comparable |
| deepSweSource | — | 53% | Not comparable |
| AA Agentic IndexSource | — | 45.7% | Not comparable |
| GDPval-AASource | — | 51.9% | Not comparable |
| GDPval-AASource | — | 1539 | Not comparable |
| AA BriefcaseSource | — | 1324 | Not comparable |
| AA AutomationBenchSource | — | 51.4% | Not comparable |
| AA EnterpriseOps-GymSource | — | 40.8% | Not comparable |
| AA Harvey LABSource | — | 13.3% | Not comparable |
| AA Tau3 BankingSource | — | 32.6% | Not comparable |
Coding8 benchmarks
| Benchmark | Gemini 2.5 Flash | Grok 4.5 | Result |
|---|---|---|---|
| Terminal-Bench HardSource | 12.1% | — | Not comparable |
| AA-SciCodeSource | 29.1% | 54.1% | Grok 4.5 leads |
| SWE-bench ProSource | — | 64.7% | Not comparable |
| SWE MultilingualSource | — | 78% | Not comparable |
| Terminal-Bench 2.0Source | — | 83.3% | Not comparable |
| cursorBench32Source | — | 66.7% | Not comparable |
| AA Coding IndexSource | — | 72.5% | Not comparable |
| AA Terminal-Bench 2.1Source | — | 81.6% | Not comparable |
Reasoning2 benchmarks
Knowledge6 benchmarks
| Benchmark | Gemini 2.5 Flash | Grok 4.5 | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 14.1% | 53.8% | Grok 4.5 leads |
| AA-GPQA DiamondSource | 68.3% | 93.1% | Grok 4.5 leads |
| AA-HLESource | 5.1% | 40.3% | Grok 4.5 leads |
| AA-Omniscience IndexSource | -42.0% | 26.4% | Grok 4.5 leads |
| AA-Omniscience AccuracySource | 26.5% | 52.1% | Grok 4.5 leads |
| AA-Omniscience Hallucination RateSource | 93.3% | 53.5% | Grok 4.5 leads |
Math2 benchmarks
Multimodal2 benchmarks
Inst. Following1 benchmarks
| Benchmark | Gemini 2.5 Flash | Grok 4.5 | Result |
|---|---|---|---|
| AA-IFBenchSource | 39.0% | — | Not comparable |
Frequently Asked Questions (3)
Can I compare Gemini 2.5 Flash and Grok 4.5 on BenchLM yet?
Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.
Why does this comparison show “coming soon”?
BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.
What data is available for Gemini 2.5 Flash and Grok 4.5 today?
Gemini 2.5 Flash: $0.30 input / $2.50 output per 1M tokens Grok 4.5: $2.00 input / $6.00 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.
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