vs
0:0
overall capability wins (1 ties across 1 scored). Price/speed category wins do not decide overall. Tied overall.
- Pricing0:3
Verdict
Mercury 2 is ~3.7x cheaper on a blended token basis than ERNIE 5.1.
Cost for 1M in + 250K out
Illustrative chat workload at primary-provider list prices.
- ERNIE 5.1
- $1.60
- Mercury 2
- $0.44
Mercury 2 is about 3.7x cheaper on this workload.
Price per 1M tokens
Full comparison
Organization
Baidu
Inception Labs
Family
Other
Other
License
Proprietary
Proprietary
Open weights
No
No
Release
May 1, 2026
Sep 1, 2026
Knowledge cutoff
-
-
API / provider
Baidu Qianfan
Inception Labs
Modalities
text, image → text
text → text
Specs
Context window
128K
128K
Max output
33K
-
Parameters
—
—
Pricing
Input $/1M
$0.80
$0.25
Output $/1M
$3.20
$0.75
Blended $/1M (3∶1)
$1.40
$0.38
Speed
tok/s
70
-
TTFT (s)
0.45
-
Reasoning
MMLU-Pro
—
—
GPQA Diamond
—
77.0
Humanity's Last Exam
—
17.1
AIME 2025
—
—
MATH-500
—
—
Humanity's Last Exam (with tools)
—
—
AA-Omniscience Accuracy
—
21.2
AA-LCR v1.1
—
43.7
CritPt
—
0.8
MMMU-Pro
—
—
IFBench
—
69.8
Chartography
—
—
Chartography (With Tools)
—
—
Coding
SWE-bench Verified
—
—
SWE-bench Pro
—
—
SWE-bench Multilingual
—
—
LiveCodeBench
—
—
Terminal-Bench 2.1
—
27.3
Aider Polyglot
—
—
Terminal-Bench 3
—
—
BigCodeBench
—
—
SciCode
—
37.7
CursorBench
—
—
SWE-Rebench
—
—
NL2Repo-Bench
—
—
DeepSWE
—
—
WebDev Arena
—
1,167
Terminal-Bench 4.0
—
—
CursorBench 4.0
—
—
FrontierCode v1.1 (Main)
—
—
Arena
LMArena Elo
1,468
—
| Metric | ERNIE 5.1 | Mercury 2 | Delta |
|---|---|---|---|
| Identity | |||
| Organization | Baidu | Inception Labs | — |
| Family | Other | Other | — |
| License | Proprietary | Proprietary | — |
| Open weights | No | No | — |
| Release | May 1, 2026 | Sep 1, 2026 | — |
| Knowledge cutoff | - | - | — |
| API / provider | Baidu Qianfan | Inception Labs | — |
| Modalities | text, image → text | text → text | — |
| Specs | |||
| Context window | 128K | 128K | tie |
| Max output | 33K | - | — |
| Parameters | — | — | — |
| Pricing | |||
| Input $/1M | $0.80 | $0.25 | B +$0.55 |
| Output $/1M | $3.20 | $0.75 | B +$2.45 |
| Blended $/1M (3∶1) | $1.40 | $0.38 | B +$1.03 |
| Speed | |||
| tok/s | 70 | - | — |
| TTFT (s) | 0.45 | - | — |
| Reasoning | |||
| MMLU-Pro | — | — | — |
| GPQA Diamond | — | 77.0 | — |
| Humanity's Last Exam | — | 17.1 | — |
| AIME 2025 | — | — | — |
| MATH-500 | — | — | — |
| Humanity's Last Exam (with tools) | — | — | — |
| AA-Omniscience Accuracy | — | 21.2 | — |
| AA-LCR v1.1 | — | 43.7 | — |
| CritPt | — | 0.8 | — |
| MMMU-Pro | — | — | — |
| IFBench | — | 69.8 | — |
| Chartography | — | — | — |
| Chartography (With Tools) | — | — | — |
| Coding | |||
| SWE-bench Verified | — | — | — |
| SWE-bench Pro | — | — | — |
| SWE-bench Multilingual | — | — | — |
| LiveCodeBench | — | — | — |
| Terminal-Bench 2.1 | — | 27.3 | — |
| Aider Polyglot | — | — | — |
| Terminal-Bench 3 | — | — | — |
| BigCodeBench | — | — | — |
| SciCode | — | 37.7 | — |
| CursorBench | — | — | — |
| SWE-Rebench | — | — | — |
| NL2Repo-Bench | — | — | — |
| DeepSWE | — | — | — |
| WebDev Arena | — | 1,167 | — |
| Terminal-Bench 4.0 | — | — | — |
| CursorBench 4.0 | — | — | — |
| FrontierCode v1.1 (Main) | — | — | — |
| Arena | |||
| LMArena Elo | 1,468 | — | — |
ERNIE 5.1
- Context
- 128K / 33K out
- Parameters
- —
- Price
- $0.80 / $3.20
- Speed
- 70 tok/s · 0.45s TTFT
- Modalities
- text, image → text
- License
- Proprietary
Baidu's ERNIE 5.1 flagship - strong bilingual Chinese/English Arena showing.
Mercury 2
- Context
- 128K
- Parameters
- —
- Price
- $0.25 / $0.75
- Speed
- —
- Modalities
- text → text
- License
- Proprietary
Inception Labs' diffusion-based (non-autoregressive) reasoning LLM, API-only with a 128K context window and high-throughput inference on Blackwell GPUs.
Benchmark charts
Winner bars are emphasized. Per-benchmark deltas sit above each chart.
These two models have no overlapping published benchmarks in our dataset. Compare specs and pricing instead.