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Put up to 4 models beside each other — token prices, context windows, capabilities and provider, from the same catalogue the model pages read.

  1. GPT-5.6 TerraOpenAIRemove
  2. Claude Sonnet 5.5AnthropicRemove
  3. Transcribe 1 ProFish AudioRemove
gpt-5.6-terra vs claude-sonnet-5.5 vs transcribe-1-pro
AttributeGPT-5.6 Terragpt-5.6-terraClaude Sonnet 5.5claude-sonnet-5.5Transcribe 1 Protranscribe-1-pro
Pricing
Input$2.00 / 1M$2.00 / 1M— Not priced per input token
Output$12.00 / 1M$10.00 / 1M— Not priced per output token
Cache Write (5m)$2.00 / 1M$2.50 / 1MNot applicable
Cache Write (1h)$2.00 / 1M$4.00 / 1MNot applicable
Cache Read$2.00 / 1M$0.20 / 1MNot applicable
Web Search$0 / 1M$0 / 1M$0 / 1M
Context
Max context1M1MN/A
Max outputN/AN/AN/A
Capabilities
VisionYesYesNo
Function CallingYesYesNo
JSON ModeYesYesNo
StreamingYesYesNo
Catalogue
ProviderOpenAIAnthropicFish Audio
Categorychatchatvoice
Charge typePay As You GoPay As You GoPay As You Go
Released——2026-09-24
Description
SummaryGPT-5.6 Terra is the balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. It is designed for everyday coding, reasoning, and agentic workflows, delivering strong performance while balancing capability and cost. Offering near-flagship quality at approximately half the cost of Sol, GPT-5.6 Terra is well suited for production applications that require reliable reasoning, software development, and scalable agent execution.Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, serving as a direct upgrade to Sonnet 5. It excels at feature development, bug fixing, and creating polished documents, presentations, and spreadsheets, while offering clearer writing and communication than its predecessor.Fish Audio Transcribe 1 Pro speech-to-text with speaker labels; transcripts include speaker tags such as <|speaker:0|>. Billed per second of audio.