# GPT Realtime 2.1 vs o4-mini (high)

> Side-by-side benchmark comparison for GPT Realtime 2.1 and o4-mini (high) across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-realtime-2-1-vs-o4-mini-high
- Last updated: September 10, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for GPT Realtime 2.1 and o4-mini (high).

## Summary

- GPT Realtime 2.1 and o4-mini (high) do not currently share a sourced benchmark row. The mirror therefore compares metadata, pricing, context windows, and each model's separately reported coverage without naming a benchmark winner.

## Model Snapshot

| Property | GPT Realtime 2.1 | o4-mini (high) |
|----------|----------|----------|
| Creator | OpenAI | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 128K | 200K |
| Independent public score (not head-to-head) | null | 47.82 |
| Benchmarks Covered | 0 | 2 |
| Pricing (input/output) | $4.00 / $24.00 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Mathematics

- Winner: Insufficient shared evidence
- GPT Realtime 2.1 public-lane score: Coming soon
- o4-mini (high) public-lane score: 43.2 (Unranked · 2 rankable rows)

| Benchmark | GPT Realtime 2.1 | o4-mini (high) | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | Coming soon | 24.828% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 6.250% | Coming soon |

## FAQ

### Can I compare GPT Realtime 2.1 and o4-mini (high) on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but sourced benchmark coverage is still incomplete for a fair score-level comparison.

### Why does this page show "coming soon" values?

BenchLM only calls winners when public benchmark coverage is available on both sides of the comparison.

## Related Comparisons

- [GPT Realtime 2.1 vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-gpt-realtime-2-1)
- [o4-mini (high) vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-o4-mini-high)
- [GPT Realtime 2.1 vs GPT-6 Astra](/compare/gpt-6-astra-vs-gpt-realtime-2-1)
- [o4-mini (high) vs GPT-6 Astra](/compare/gpt-6-astra-vs-o4-mini-high)

## Explore More

- [GPT Realtime 2.1 profile](/models/gpt-realtime-2-1)
- [o4-mini (high) profile](/models/o4-mini-high)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)