Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
GPT-5.4 Pro
92
Ling 2.6 Flash
44
Pick GPT-5.4 Pro if you want the stronger benchmark profile. Ling 2.6 Flash only becomes the better choice if knowledge is the priority or you want the cheaper token bill.
Knowledge
+10.0 difference
GPT-5.4 Pro
Ling 2.6 Flash
$30 / $180
$0.1 / $0.3
74 t/s
209.5 t/s
151.79s
1.07s
1.05M
262K
Pick GPT-5.4 Pro if you want the stronger benchmark profile. Ling 2.6 Flash only becomes the better choice if knowledge is the priority or you want the cheaper token bill.
GPT-5.4 Pro is clearly ahead on the provisional aggregate, 92 to 44. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.4 Pro is also the more expensive model on tokens at $30.00 input / $180.00 output per 1M tokens, versus $0.10 input / $0.30 output per 1M tokens for Ling 2.6 Flash. That is roughly 600.0x on output cost alone. GPT-5.4 Pro is the reasoning model in the pair, while Ling 2.6 Flash is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use. GPT-5.4 Pro gives you the larger context window at 1.05M, compared with 262K for Ling 2.6 Flash.
GPT-5.4 Pro is ahead on BenchLM's provisional leaderboard, 92 to 44.
Ling 2.6 Flash has the edge for knowledge tasks in this comparison, averaging 59 versus 49. GPT-5.4 Pro stays close enough that the answer can still flip depending on your workload.
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