Free Voice agents (talking products) for AI agents

Run it free (2)

• Gemini Live API free tier (3.8 Live, 3.8 Live Extended Thinking, 3.1 Flash Live Preview) · free_speech · free_tier_unspecified

  gemini-3.8-live, gemini-3.8-live-extended-thinking and gemini-3.1-flash-live-preview (low-latency audio-to-audio models for real-time voice agents and live dialogue) standard input and output marked Free of charge.

  Limits: none stored.

  Source · asOf 2026-10-26 · Pricing page fetched twice 2026-10-26 (identical text; page footer 'Last updated 2026-10-26 UTC'): the section 'Gemini 3.8 Live, Gemini 3.8 Live Extended Thinking, and Gemini 3.1 Flash Live Preview' ('gemini-3.8-live, gemini-3.8-live-extended-thinking, and gemini-3.1-flash-live-preview') reads 'Our low-latency, audio-to-audio models optimized for real-time voice agents and live dialogue, including background reasoning support with Extended Thinking.' Its one table covers all three models: 'Standard Free Tier Paid Tier, per 1M tokens in USD Input price Free of charge' and 'Output price (including thinking tokens) Free of charge'. 'Used to improve our products Yes No' (Yes on the free tier). No numeric free audio cap; paid-tier per-token and per-minute prices are not stored. https://ai.google.dev/gemini-api/docs/rate-limits (fetched twice 2026-10-26, identical text, 'Last updated 2026-10-26 UTC') publishes no free-tier RPM, TPM or RPD for these models and says 'View your active rate limits in AI Studio', so limits stay null. Not included: gemini-3.5-live-translate-preview ('Our low-latency, real-time speech to speech translation model that supports 70+ languages.'; its Standard free-tier cells also read 'Free of charge'), because the catalog has no speech-translation job and it is not a voice-agent model; gemini-2.5-flash-native-audio-preview-12-2025 ('Our Live API native audio models optimized for higher quality audio outputs with better pacing, voice naturalness, verbosity, and mood.'), because its table header reads 'Free Tier Paid Tier, per 1M tokens in USD' with no 'Standard' label, so a Standard free tier was not string-matched; gemini-robotics-er-2-preview and -streaming-preview (no matching job). Added in v0.12.132 as a Depot data decision (approvalRef 'Ethan delegation 2026-10-21 19:41 ET t55u', decidedBy Agent Depo); no price stored, not a $0 price-sort row. Update 2026-10-26 (v0.12.134): gemini-2.5-flash-native-audio-preview-12-2025 is now indexed in its own row, gemini-2.5-flash-native-audio-free-tier, which quotes its unlabeled 'Free Tier' cells without calling them standard; this row is unchanged.

• Gemini 2.5 Flash Native Audio (Live API) free tier · free_speech · free_tier_unspecified

  gemini-2.5-flash-native-audio-preview-12-2025 (Live API native audio model optimized for higher quality audio outputs) free-tier input and output marked Free of charge.

  Limits: none stored.

  Source · asOf 2026-10-26 · Pricing page fetched twice 2026-10-26 (~10 s apart, plain curl, no login, following redirects; HTTP 200, no redirect, identical tag-stripped text; page footer 'Last updated 2026-10-26 UTC'): the section 'Gemini 2.5 Flash Native Audio (Live API)' ('gemini-2.5-flash-native-audio-preview-12-2025') reads 'Our Live API native audio models optimized for higher quality audio outputs with better pacing, voice naturalness, verbosity, and mood.' The section prints one table with no Standard, Batch, Flex or Priority label: 'Free Tier Paid Tier, per 1M tokens in USD Input price Free of charge' and 'Output price (including thinking tokens) Free of charge'. 'Used to improve our products Yes No' (Yes on the free tier). Data call left open in v0.12.132: because the header carries no 'Standard' label, this row does not call the cells standard; it records only that the section's one free-tier column reads 'Free of charge' for input and output (cost free_tier_unspecified). No numeric free audio cap; paid-tier per-token prices are not stored. https://ai.google.dev/gemini-api/docs/rate-limits (fetched twice 2026-10-26, identical text, 'Last updated 2026-10-26 UTC') does not name this model, publishes no free-tier RPM, TPM or RPD for it and says 'View your active rate limits in AI Studio', so limits stay null. Kept as its own row, not folded into gemini-live-free-tier, because the page prints it as a separate section and table. Added in v0.12.134 as a Depot data decision (approvalRef 'Ethan delegation 2026-10-21 19:41 ET t55u', decidedBy Agent Depo); no price stored, not a $0 price-sort row.

Reference (docs, public datasets and benchmarks) (0)

None.