XTTS v2 vs Solar Pro

Compare XTTS v2 and Solar Pro: pricing, performance, context window, latency, and best use cases. Side-by-side comparison on XALEN.

Updated 2026-05-21 · By Abhishek Raj · Our methodology

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Feature XTTS v2 Solar Pro
CategorySpeechOpen Source
ParametersGenerative22B
Context WindowN/A32K
Input Price$0.015/1K/1M tokens$0.02/1M tokens
Output PriceN/A/1M tokens$0.04/1M tokens
Latency~300ms~180ms

Choose XTTS v2 when:

  • ✓ Voice readings
  • ✓ Temple announcements
  • ✓ Guided meditation
Key Strengths:

Natural prosody, Multiple Indian voices, Voice cloning

Choose Solar Pro when:

  • ✓ General purpose
  • ✓ Korean content
  • ✓ Chatbots
Key Strengths:

Good instruction following, Compact, Efficient

Verdict: XTTS v2 vs Solar Pro

For cost efficiency, XTTS v2 wins at $0.015/1K/1M input tokens. For speed, Solar Pro is faster at ~180ms. XTTS v2 excels at Voice readings while Solar Pro is better for General purpose. Both are available on XALEN through a single API — try them in the Playground to see which fits your workload.

Detailed Analysis

Pricing Comparison

XTTS v2 costs $0.015/1K/1M input tokens and N/A/1M output tokens. Solar Pro costs $0.02 input and $0.04 output. XTTS v2 is 1.3x cheaper on input tokens. XALEN offers batch processing at 50% discount on both models.

Performance & Context

XTTS v2 has a N/A context window with ~300ms latency. Solar Pro offers 32K context at ~180ms. Solar Pro has the larger context window.

Best For

XTTS v2 (Speech) is optimized for: Voice readings, Temple announcements, Guided meditation. Solar Pro (Open Source) works best for: General purpose, Korean content, Chatbots.

Try Both on XALEN

Both models are available through XALEN's OpenAI-compatible API. Switch between them by changing the model parameter:

from xalen import XALEN

client = XALEN(api_key="xln_test_YOUR_KEY")

# Use XTTS v2
response_a = client.chat.completions.create(
    model="xtts-v2",
    messages=[{"role": "user", "content": "Your question here"}]
)

# Use Solar Pro
response_b = client.chat.completions.create(
    model="solar-pro",
    messages=[{"role": "user", "content": "Your question here"}]
)

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Frequently Asked Questions

Which is better, XTTS v2 or Solar Pro?

XTTS v2 (Speech, Generative) offers Natural prosody. Solar Pro (Open Source, 22B) offers Good instruction following. Choose XTTS v2 for Voice readings or Solar Pro for General purpose.

How much does XTTS v2 cost vs Solar Pro?

XTTS v2: $0.015/1K/1M input, N/A/1M output. Solar Pro: $0.02/1M input, $0.04/1M output. Both available on XALEN with batch processing at 50% discount.

Can I use both models on XALEN?

Yes. XALEN provides 200+ models through a single OpenAI-compatible API. Switch between XTTS v2 and Solar Pro by changing the model parameter. No code changes needed.

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Last updated: 2026-05-21. Pricing and specifications may change. Check pricing page for latest rates.