StepFun

Step Audio 2

StepFun’s end-to-end speech model — TTS, STT and voice chat in a single checkpoint.

#22dirilis 24 Sep 2026·Proprietary·Not disclosed
textaudio64K ctx
Penyedia APIDapatkan Kunci API →Peringkat
Inteligensi
89.0 #22
AAQI 89.0
Kecepatan output
150 t/s
ITL 6.7 ms/tok
Harga gabungan (3:1)
$0.015 /1M
Input $0.012/M · Output $0.024/M
Konteks
64K
≈ 160 halaman A4 · output maks 8,192

Quality Domain Radar

6-Axis Frontier Evaluation vs Category Average & Flagship

Step Audio 2
Claude Mythos Preview (#1)
Average (68)
Coding (15)Mathematics (15)Hard Science (GPQA) (32)Agentic & Tool Use (55)Knowledge (MMLU) (46)Vision / Multimodal (85)

Sumbu radar diaproksimasi dari skor kategori jika pengukuran benchmark langsung tidak tersedia — lihat Metodologi.

Kelebihan & Trade-off

Di mana ia menang

  • Single model replaces a whole voice pipeline
  • Best-in-class Chinese speech quality
  • Understands tone and emotion, not just words

Hal yang perlu diperhatikan

  • English prosody below Eleven/Cartesia tiers
  • Ecosystem concentrated in APAC
  • No self-hosting

Kasus Penggunaan Killer

Speech-to-speech agents
Direct voice chat without TTS/STT glue.
Chinese voice products
Native Mandarin/Cantonese synthesis and ASR.
Emotion-aware bots
Reacts to caller sentiment in real time.

Quickstart Developer & API

Atur STEPFUN_API_KEY dulu — dapatkan kunci API
curl https://api.stepfun.com/v1/chat/completions \
  -H "Authorization: Bearer $STEPFUN_API_KEY" \
  -H "content-type: application/json" \
  -d '{
    "model": "step-audio-2",
    "messages": [{"role": "user", "content": "Refactor this function for O(n) time and explain the change."}]
  }'

Sumber Daya & Tautan Resmi

Deployment API

Bandingkan host & latensi

Throughput, TTFT, dan harga cache di Groq, Cerebras, Together, DeepInfra, Fireworks, Bedrock, dan Azure.

GroqCerebrasTogether AIDeepInfraFireworks AIAWS BedrockAzure AI
Lihat matriks penyedia →

Skor per sumber

Spesifikasi Live & Arsitektur

Di balik kap
Step Audio 2 — unified speech model
  • One checkpoint for TTS, STT and speech-to-speech chat
  • Paralinguistic understanding — emotion, emphasis, age cues
  • Voice-to-voice tool calling for agent stacks
  • Strong Mandarin/Cantonese coverage
Tanggal rilis
24 Sep 2026
Arsitektur
Step Audio 2 — unified speech model
Parameter
Not disclosed
Lisensi
Proprietary
Jendela konteks
64,000 tokens
Output maks
8,192 tokens
Modalitas
text + audio
Harga cache
baca $0.004 · tulis $0.015 /1M
Penalaran
—
Harga input
$0.012/M
Harga output
$0.024/M
Kecepatan output
150 t/s
Waktu ke token pertama
—
Data diperbarui
22 Okt 2026

Estimasi tagihan bulanan

Estimasi pengeluaran bulanan
$0.00
Menghitung penghematan vs GPT-4o…

Kutip & sematkan

Badge Markdown GitHub
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BibTeX
@misc{llmpodium2026stepaudio2,
  title = {Benchmark Analysis and Intelligence Evaluation of Step Audio 2},
  author = {LLMPodium Research},
  year = {2026},
  url = {https://llmpodium.com/models/step-audio-2}
}

Sematkan Lencana Skor

Tambahkan lencana Podium Score langsung ke README GitHub atau Hugging Face Anda — menautkan ke peringkat langsung.

Pratinjau
Step Audio 2 LLMPodium Score
Markdown
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HTML
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