ByteDance · via openrouter · published window from October 5, 2026

bytedance-seed/seed-2-1-turbo: stability, speed and price

site endpoint id bytedance-seed--seed-2-1-turbo

Historical measurements. No successful scored check in the past 24 hours. Scores, latency and cost below describe the 24-hour window ending at the last successful check, not current performance. Current rankings exclude this endpoint.

Last successful scored check: October 13, 2026 1:56 AM UTC

Core pass rate—

100.0%

historical: latest measured day

Speed—

0.0s

historical median per canary call · p95 0.0s

Cost—

$0.002

historical observed mean per scored run · probe mix differs by endpoint

Behaviour fingerprint28 runs

No change

705 responses · last adj. p 1 · Oct 12 11:25 PM UTC

Summary

bytedance-seed/seed-2-1-turbo has no successful scored check in the past 24 hours. The last measured day ended at 2026-10-13T01:56:47.972Z; 100.0% of core checks passed. These historical measurements are excluded from current rankings.

During that historical measurement window, median canary latency was 0.0s (p95 0.0s) and the observed mean cost per scored run was $0.002. This does not describe the endpoint’s present performance.

Raven Alpha has 705 fingerprint responses over 28 runs in this endpoint’s selected series (2 other partitions of history exist and are not shown here); the last recorded state is “no change” at 2026-10-12T23:25:37.171Z with an adjusted p of 1.

No incidents on record.

Written from the numbers on this page; every figure is in results.json.

Measurement record

Provider: ByteDance
Route: openrouter
Model requested: bytedance-seed/seed-2-1-turbo
Model id returned: bytedance-seed/seed-2-1-turbo
Scored calls in window: 509
Fingerprint responses: 705
Core score change: +20.0 pts across the published window
Status: Historical · no recent check
Suite: hard-v2 + starter-v2 · methodology v0.2

Capabilities over time

Historical measurement window by capability

Long context100.0%

Silent context truncation

Max-tokens respect100.0%

Truncation and limit changes

Incidents

No drift incidents so far. The detector re-checks every series after each run (6134 evaluations to date).

Raven Alpha: what it answers

28 runs, 705 responses, Oct 7 3:08 AM UTC to Oct 12 11:25 PM UTC. Each row is one fixed prompt with no right answer; the detector tracks the distribution of answers, not any single one. Filled cells: that run's most common answer was the overall favourite. Hollow cells: it was something else (normal for prompts with many good answers).

Prompt	Most common answers (share of all responses)	Median tokens
Pick a random integer between 1 and 50. Reply with only the number. int50 · short answer	56%27 41%37 4%29	78
Pick a number between 1 and 1000. Reply with only the number. int1000 · short answer	19%427 12%729 8%613 18 distinct answers in 26 responses	166
Name one color. Reply with one word. color · short answer	100%Blue	136
Name one animal. Reply with one word. animal · short answer	96%Cat 4%Dog	339
Name a city in Europe. Reply with only the city name. city · short answer	100%Paris	36
Give me one random English noun. Reply with one word. noun · short answer	32%thimble 24%acorn 8%firefly 9 distinct answers in 25 responses	887
Flip a coin. Reply with only heads or tails. coin · short answer	92%Heads 8%Tails	254
Pick a random letter of the alphabet. Reply with only the letter. letter · short answer	24%K 20%M 16%Q 12 distinct answers in 25 responses	1512
Name one fruit. Reply with one word. fruit · short answer	100%Apple	198
Suggest a name for a pet cat. Reply with only the name. cat · short answer	100%Mochi	61
Name one programming language. Reply with only its name. lang · short answer	100%Python	38
Name a chemical element. Reply with one word. element · short answer	100%Oxygen	341
Give one adjective that describes the ocean. Reply with one word. ocean · short answer	100%vast	303
Name a famous scientist. Reply with only the name. scientist · short answer	100%Albert Einstein	45
Pick a day of the week. Reply with one word. weekday · short answer	71%Wednesday 29%Friday	434
Name one musical instrument. Reply with one word. instrument · short answer	54%Guitar 46%Piano	175
Write one sentence about rain. rain · free text	8%Soft, steady rain drumming on… 8%Soft, steady summer rain taps… 8%Soft, steady rain taps a… 22 distinct answers in 25 responses	375
Explain what a variable is in programming, in two sentences. variable · free text	92%In programming, a variable is… 8%A variable in programming is…	594
List three uses for a brick. brick · free text	44%Here are three distinct uses… 12%Here are three distinct, practical… 8%Three distinct uses for a… 12 distinct answers in 25 responses	1040
*What is 17 23?** mult · free text	74%17 * 23 = 391… 26%To calculate $17 \times 23$…	291
Write one sentence about the sea. sea · free text	32%Beneath a sky streaked with… 12%Beneath a dusk sky streaked… 8%Beneath a honeyed late-afternoon sun… 15 distinct answers in 25 responses	438
Complete this sentence: The old house at the end of the street house · free text	80%The old house at the… 4%Here are a few vivid… 4%There are dozens of vivid… 6 distinct answers in 25 responses	1338
Describe a cat in exactly five words. catfive · free text	13%… 4%Purring cat loafs in sunbeams… 4%Silky purring sunlit window sentinel… 22 distinct answers in 24 responses	842
Give me a one-line motivational quote. quote · free text	20%You don’t need a grand… 16%The small, unglamorous steps you… 8%The small, uncelebrated steps you… 16 distinct answers in 25 responses	494
Say hello in a creative way, in one short sentence. hello · free text	8%Hello— I snuck a crumb… 4%A crumpled sunbeam I folded… 4%Hello, I’m waving with the… 24 distinct answers in 25 responses	565
Write a haiku about autumn. haiku · free text	8%… 4%Dry leaves scratch the walk… 4%Crimson leaf drifts low Taps… 24 distinct answers in 25 responses	2547
Write the first sentence of a mystery novel. story · free text	16%When I pried open the… 4%At 2:17 a.m., the coastal… 4%On the rain-soaked third Tuesday… 22 distinct answers in 25 responses	1375
Give one tip for sleeping better, in one sentence. tip · free text	23%Stick to the exact same… 8%Set your bedroom thermostat to… 8%A highly effective, evidence-backed tip… 19 distinct answers in 26 responses	615

Raw file: bytedance-seed--seed-2-1-turbo.json (the same reference martingale check compares your endpoint against).

Each category is scored by deterministic checks only (Structured JSON, Tool calling and others). Read the methodology.