Model comparison
GPT-4 Turbo vs Mellum2-12B-A2.5B-Instruct
Head-to-head evidence from 0 shared benchmark results across 0 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: GPT-4 Turbo #188 (Supported); Mellum2-12B-A2.5B-Instruct unranked (Not scored). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. GPT-4 Turbo and Mellum2-12B-A2.5B-Instruct share 0 comparable benchmark results. 0 of 8 categories are comparable. 4 results are unique to GPT-4 Turbo; 5 to Mellum2-12B-A2.5B-Instruct.
Updated July 23, 2026- Shared results
- 0
- GPT-4 Turbo only
- 4
- Mellum2-12B-A2.5B-Instruct only
- 5
- Comparable categories
- 0 / 8
Benchmark data for GPT-4 Turbo and Mellum2-12B-A2.5B-Instruct is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 0 shared benchmark results across 0 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.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | GPT-4 Turbo | Mellum2-12B-A2.5B-Instruct | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | GPT-4 Turbo$10 input / $30 output | Mellum2-12B-A2.5B-InstructNot available | A complete price comparison is not available. |
| Generation speedtokens per second | GPT-4 Turbo30 tok/s | Mellum2-12B-A2.5B-InstructNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | GPT-4 Turbo2.84 s | Mellum2-12B-A2.5B-InstructNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | GPT-4 Turbo128K | Mellum2-12B-A2.5B-Instruct128K | Listed context windows are equal. |
Benchmark Deep Dive
Frequently Asked Questions (3)
Can I compare GPT-4 Turbo and Mellum2-12B-A2.5B-Instruct 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 GPT-4 Turbo and Mellum2-12B-A2.5B-Instruct today?
GPT-4 Turbo: $10.00 input / $30.00 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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