vs
0:0
overall capability wins (1 ties across 1 scored). Mercury 2 leads overall.
Verdict
Mercury 2 and SeedRealtime are closely matched on the overlapping metrics we have.
Cost for 1M in + 250K out
Illustrative chat workload at primary-provider list prices.
- Mercury 2
- $0.44
- SeedRealtime
- -
Price per 1M tokens
Full comparison
Organization
Inception Labs
ByteDance
Family
Other
Other
License
Proprietary
Proprietary
Open weights
No
No
Release
Sep 1, 2026
Aug 5, 2026
Knowledge cutoff
-
-
API / provider
Inception Labs
No primary API price listed
Modalities
text → text
text, audio, video → text, audio
Specs
Context window
128K
128K
Max output
-
-
Parameters
—
—
Pricing
Input $/1M
$0.25
—
Output $/1M
$0.75
—
Blended $/1M (3∶1)
$0.38
-
Speed
tok/s
-
-
TTFT (s)
-
-
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
—
—
| Metric | Mercury 2 | SeedRealtime | Delta |
|---|---|---|---|
| Identity | |||
| Organization | Inception Labs | ByteDance | — |
| Family | Other | Other | — |
| License | Proprietary | Proprietary | — |
| Open weights | No | No | — |
| Release | Sep 1, 2026 | Aug 5, 2026 | — |
| Knowledge cutoff | - | - | — |
| API / provider | Inception Labs | No primary API price listed | — |
| Modalities | text → text | text, audio, video → text, audio | — |
| Specs | |||
| Context window | 128K | 128K | tie |
| Max output | - | - | — |
| Parameters | — | — | — |
| Pricing | |||
| Input $/1M | $0.25 | — | — |
| Output $/1M | $0.75 | — | — |
| Blended $/1M (3∶1) | $0.38 | - | — |
| Speed | |||
| tok/s | - | - | — |
| TTFT (s) | - | - | — |
| 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 | — | — | — |
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.
SeedRealtime
- Context
- 128K
- Parameters
- —
- Price
- —
- Speed
- —
- Modalities
- text, audio, video → text, audio
- License
- Proprietary
Native audio-visual full-duplex LLM — unified end-to-end perception, understanding, and speech generation for real-time watch-listen-speak interaction; rolled out in Doubao app (no public API yet).
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.