A 10-second 720p video costs from $0.50 with Veo 3.1 Lite. Images start at $0.02 each with Grok Imagine Image. Transcription starts at about $0.10 per hour with Grok Speech to Text.
Prices from official pricing pages, verified September 15, 2026.
Image generation
Price per generated image at about 1K resolution where the provider publishes a per-image figure.
Model
Official prices
Price per image
100 images
Grok Imagine Image
xAI · grok-imagine-image
Per image: $0.02
xAI does not list a resolution for this price.
$0.02
$2.00
Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image)
Google · gemini-3.1-flash-lite-image
1K image: $0.0336
Image output is priced at $30 per 1M tokens. Batch pricing is half.
$0.0336
$3.36
Grok Imagine Image 2.0
xAI · grok-imagine-image-2.0
Per image: $0.04
xAI does not list a resolution for this price.
$0.04
$4.00
Nano Banana 2 (Gemini 3.1 Flash Image)
Google · gemini-3.1-flash-image
0.5K image: $0.045
1K image: $0.067
2K image: $0.101
4K image: $0.151
Image output is priced at $60 per 1M tokens; per-image figures are Google’s equivalents. Batch pricing is half.
$0.067
$6.70
Nano Banana Pro (Gemini 3 Pro Image)
Google · gemini-3-pro-image
1K or 2K image: $0.134
4K image: $0.24
Image output is priced at $120 per 1M tokens. Batch and Flex pricing is half.
$0.134
$13.40
GPT Image 2
OpenAI · gpt-image-2
Image input / 1M tokens: $8.00
Image output / 1M tokens: $30.00
Text input / 1M tokens: $5.00
Priced per token; the cost per image depends on size and quality. Batch pricing is half.
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GPT Image 1 Mini
OpenAI · gpt-image-1-mini
Image input / 1M tokens: $2.50
Image output / 1M tokens: $8.00
Text input / 1M tokens: $2.00
Priced per token; the cost per image depends on size and quality. Batch pricing is half.
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Video generation
Price per second of generated video at 720p, the resolution every provider here supports.
Model
Official prices
Price per second
10-second clip
Veo 3.1 Lite
Google · veo-3.1-lite-generate-preview
720p, with audio: $0.05 / sec
1080p, with audio: $0.08 / sec
4K output is not supported.
$0.05
$0.50
Veo 3.1 Fast
Google · veo-3.1-fast-generate-preview
720p, with audio: $0.10 / sec
1080p, with audio: $0.12 / sec
4K, with audio: $0.30 / sec
$0.10
$1.00
Sora 2
OpenAI · sora-2
720p: $0.10 / sec
Batch pricing is half.
$0.10
$1.00
Sora 2 Pro
OpenAI · sora-2-pro
720p: $0.30 / sec
1024p: $0.50 / sec
1080p: $0.70 / sec
Batch pricing is half.
$0.30
$3.00
Veo 3.1
Google · veo-3.1-generate-preview
720p or 1080p, with audio: $0.40 / sec
4K, with audio: $0.60 / sec
Only charged when the video is generated successfully.
$0.40
$4.00
Grok Imagine Video 1.5
xAI · grok-imagine-video-1.5
Per second: $0.08 / sec
xAI does not list a resolution for this price, so it is not ranked against 720p prices.
resolution not listed
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Speech to text
Price per minute of transcribed audio.
Model
Official prices
Price per minute
1 hour of audio
Grok Speech to Text
xAI · grok-stt
REST: $0.10 / hour
Streaming: $0.20 / hour
$0.001667
$0.10
GPT-4o Mini Transcribe
OpenAI · gpt-4o-mini-transcribe
Estimated: $0.003 / min
Input / output per 1M tokens: $1.25 / $5.00
Per-minute figure is OpenAI’s estimate.
$0.003
$0.18
GPT Transcribe
OpenAI · gpt-transcribe
Transcription: $0.0045 / min
$0.0045
$0.27
Gemini 3.5 Transcribe
Google · gemini-3.5-transcribe
Estimated: ~$0.005 / min
Audio input / text output per 1M tokens: $2.00 / $12.00
Per-minute figure is Google’s estimate (25 audio tokens per second, 175 text tokens per minute). Includes speaker diarization and word-level timestamps.
$0.005
$0.30
Whisper
OpenAI · whisper-1
Transcription: $0.006 / min
$0.006
$0.36
Text to speech
Price per 1 million characters of input text, where the provider prices by character.
Model
Official prices
Price per 1M characters
100K characters
OpenAI TTS
OpenAI · tts-1
Text input: $15.00 / 1M characters
$15.00
$1.50
Grok Text to Speech
xAI · grok-tts
Text input: $15.00 / 1M characters
$15.00
$1.50
OpenAI TTS HD
OpenAI · tts-1-hd
Text input: $30.00 / 1M characters
$30.00
$3.00
GPT-4o Mini TTS
OpenAI · gpt-4o-mini-tts
Text input / 1M tokens: $0.60
Audio output / 1M tokens: $12.00
priced per token
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Gemini 3.1 Flash TTS
Google · gemini-3.1-flash-tts-preview
Text input / 1M tokens: $1.00
Audio output / 1M tokens: $20.00
Preview model. Batch pricing is half.
priced per token
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Voice agents
Price per minute of a live speech-to-speech conversation.
Model
Official prices
Price per minute
10-minute call
GPT-Live 1
OpenAI · gpt-live-1
Voice session: $0.05 / min
Billed per second. Backend model and tool usage is charged separately.
$0.05
$0.50
Grok Voice (speech to speech)
xAI · grok-voice-think-fast-2.0
Audio: $0.08 / min ($4.80 / hour)
xAI also lists a separate charge for text input.
$0.08
$0.80
Reading these prices
Units differ by provider. Some charge per image, second or minute; others per token. We only rank models on a shared unit and show token prices as published.
Resolution and quality change the bill. 4K images and 1080p or 4K video cost more — see each model’s full price list.
Batch jobs are cheaper. Several providers halve prices for batch requests that don’t need an immediate result.
At 720p, Veo 3.1 Lite is the cheapest we track at $0.05 per second, so a 10-second clip costs about $0.50. Sora 2 costs $0.10 per second and Veo 3.1 Standard $0.40.
What is the cheapest AI image generation API?
Grok Imagine Image is the cheapest per-image price we track at $0.02. OpenAI’s GPT Image models are priced per token, so their cost per image depends on size and quality.
How much does AI transcription cost per hour?
Grok Speech to Text is the cheapest at about $0.10 per hour of audio. OpenAI Whisper costs $0.006 per minute ($0.36 per hour).