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Compare / head-to-head

Gemma 4 12B UnifiedvsGPT-5.5 Pro

GPT-5.5 Pro leads 1 of 1 shared benchmark. GPT-5.5 Pro has the larger context window (1.1M tokens).

Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.

Shared benchmarks
0 – 1
GPT-5.5 Pro leads
Cheaper per token
list price, input + output
Larger context
GPT-5.5 Pro
1.1M tokens
Provider uptime (30d)
100% · 94.2446%
Google · OpenAI
Gemma 4 12B Unified
Google · released 2026-06-03
textvisionaudio
Context
256K
Max out
Input /1M
Output /1M
Cached /1M
Scores
5 · 4 core
GPT-5.5 Pro
OpenAI · released 2026-04-23
textvision
Context
1.1M
Max out
128K
Input /1M
$30
Output /1M
$180
Cached /1M
Scores
8 · 6 core
Quality

Benchmark matrix

BenchmarkGemma 4 12B UnifiedGPT-5.5 ProΔEdge
Reported by both · 1
Humanity's Last Exam (no tools)5.2% 43.1% -37.9 ptGPT-5.5 Pro
Only Gemma 4 12B Unified reports · 4
GPQA Diamond78.8% not reported
MMLU-Pro77.2% not reported
AIME 202677.5% not reported
LiveCodeBench v672% not reported
Only GPT-5.5 Pro reports · 7
BrowseCompnot reported90.1%
FrontierMath Tier 1-3not reported52.4%
FrontierMath Tier 4not reported39.6%
FrontierMath Tier 4 v2 (Epoch AI run)not reported78% epoch
FrontierMath Tiers 1-3 v2 (Epoch AI run)not reported87.7% epoch
GDPval (wins or ties)not reported82.3%
Humanity's Last Exam (with tools)not reported57.2%
Scores tagged "epoch" or "matharena" are independent runs, used only where the lab has not published its own; ⚠ marks rows MathArena flags as released after the competition. Higher is better on every row. Δ is Gemma 4 12B Unified minus GPT-5.5 Pro in the benchmark's own unit. "Not reported" means the lab has not published that figure; it is not a zero. ↗ opens the source.
Specs & pricing

Side by side

SpecGemma 4 12B UnifiedGPT-5.5 ProEdge
Context window256K tokens1.1M tokensGPT-5.5 Pro
Max output128K tokens
Input price / 1M$30
Output price / 1M$180
Cached input / 1M
Input + output / 1M
Lower is cheaper. List prices; batch, tool and regional fees excluded.
$210
Modalitiestext · vision · audiotext · visionGemma 4 12B Unified
Released2026-06-032026-04-23
Cited benchmark scores58
Reliability

Provider status

All providers
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Which one wins on your data?

Public benchmarks are a starting point. Run Gemma 4 12B Unified and GPT-5.5 Pro on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.