Model

Agentic Chat (GPT-5.6 Luna)

1 providers · 25 listingsreleased Sep 4, 2026

Free

cheapest listed tier

1.05M

context window

128K

max output

Compare providers (sorted by listed input price)

			Cache read /M	Cache write /M		Capabilities
GitLab Duovariant duo-chat-gpt-5-6-luna	—	—	$0	$0	1.05M	reasoningtoolsstructuredvision	Jul 9, 2026
GitLab Duovariant duo-chat-opus-5	—	—	$0	$0	1M	reasoningtoolsno structuredvision	Jul 24, 2026
GitLab Duovariant duo-chat-opus-4-8	—	—	$0	$0	1M	reasoningtoolsno structuredvision	May 28, 2026
GitLab Duovariant duo-chat-gpt-5-1	—	—	—	—	400K	reasoningtoolsstructuredvision	Jan 22, 2026
GitLab Duovariant duo-chat-gpt-5-2	—	—	—	—	400K	reasoningtoolsstructuredvision	Jan 23, 2026
GitLab Duovariant duo-chat-gpt-5-4-nano	—	—	—	—	400K	reasoningtoolsstructuredvision	Mar 17, 2026
GitLab Duovariant duo-chat-haiku-4-5	—	—	$0	$0	200K	reasoningtoolsno structuredvision	Jan 8, 2026
GitLab Duovariant duo-chat-opus-4-6	—	—	$0	$0	1M	reasoningtoolsno structuredvision	Feb 5, 2026
GitLab Duovariant duo-chat-gpt-5-6-terra	—	—	$0	$0	1.05M	reasoningtoolsstructuredvision	Jul 9, 2026
GitLab Duovariant duo-chat-sonnet-5	—	—	$0	$0	1M	reasoningtoolsno structuredvision	Jun 30, 2026
GitLab Duovariant duo-chat-opus-4-5	—	—	$0	$0	200K	reasoningtoolsno structuredvision	Jan 8, 2026
GitLab Duovariant duo-chat-gpt-6-astra	—	—	$0	$0	1.05M	reasoningtoolsstructuredvision	Sep 4, 2026
GitLab Duovariant duo-chat-gpt-5-3-codex	—	—	—	—	400K	reasoningtoolsstructuredvision	Feb 5, 2026
GitLab Duovariant duo-chat-fable-5-1	—	—	$0	$0	1M	reasoningtoolsno structuredvision	Sep 1, 2026
GitLab Duovariant duo-chat-gpt-5-4-mini	—	—	—	—	400K	reasoningtoolsstructuredvision	Mar 17, 2026
GitLab Duovariant duo-chat-sonnet-4-6	—	—	$0	$0	1M	reasoningtoolsno structuredvision	Feb 17, 2026
GitLab Duovariant duo-chat-gpt-5-5	—	—	—	—	1.05M	reasoningtoolsstructuredvision	Apr 23, 2026
GitLab Duovariant duo-chat-fable-5	—	—	$0	$0	1M	reasoningtoolsno structuredvision	Jun 9, 2026
GitLab Duovariant duo-chat-opus-4-7	—	—	$0	$0	1M	reasoningtoolsno structuredvision	Apr 16, 2026
GitLab Duovariant duo-chat-gpt-5-4	—	—	—	—	1.05M	reasoningtoolsstructuredvision	Mar 5, 2026

Best price history

Daily lowest published price across live providers. A lower line is better for the buyer.

Best input /M: $0unchanged
Best output /M: $0unchanged
Provider coverage: 25; 23 at the start · 24 snapshots

Published best prices are unchanged.

24 daily snapshots collected from Aug 21, 2026 through Sep 14, 2026. A price chart will appear after the first real move.

Recent changes

Changelog →

new modelvia gitlab · Sep 8, 2026
new modelvia gitlab · Sep 2, 2026

Prices are per million tokens (USD). “—” means the provider does not publicly list a price for this model. Data from models.dev; verify with the provider before purchasing.