Interactive model history

Claude Model Timeline Explorer

Filter Claude releases by family, status, context window, model ID, date, and cited Anthropic source. No signup and no data leaves the browser.

Verified 2026-09-19Client-side onlyClaude Archive is an independent educational publication and is not affiliated with Anthropic.

Explorer

Filter Claude model releases

Search names, IDs, context windows, prices, lifecycle status, and cited source notes.

SearchFamilyStatus

26 releases shown

Date	Release	Family	Status	Context	Price / MTok	Model IDs and source
2023-03-14	Claude and Claude Instant Original public Claude and Claude Instant era after a closed alpha with partners.	Claude / Instant	Retired	Not stated in cited launch post	Not listed	`claude-1.0 \| claude-1.1 \| claude-1.2 \| claude-1.3 \| claude-instant-1.0 \| claude-instant-1.1 \| claude-instant-1.2` Source: Introducing Claude
2023-07-11	Claude 2 Public beta and API availability with a 100K-token input window.	Claude 2	Retired	100K tokens	Not listed	`claude-2.0` Source: Claude 2
2023-11-21	Claude 2.1 Expanded context window, system prompts, beta tool use, and updated pricing schedule.	Claude 2	Retired	200K tokens	Not listed	`claude-2.1` Source: Introducing Claude 2.1
2024-03-04	Claude 3 Opus Highest-capability Claude 3 family member at launch.	Opus	Retired	200K tokens	$15 / $75	`claude-3-opus-20240229` Source: Introducing the next generation of Claude
2024-03-04	Claude 3 Sonnet Claude 3 middle-tier model for balance between intelligence and speed.	Sonnet	Retired	200K tokens	$3 / $15	`claude-3-sonnet-20240229` Source: Introducing the next generation of Claude
2024-03-04	Claude 3 Haiku Claude 3 speed and cost-efficiency tier.	Haiku	Retired	200K tokens	$0.25 / $1.25	`claude-3-haiku-20240307` Source: Introducing the next generation of Claude
2024-06-21	Claude 3.5 Sonnet First Claude 3.5 model, launched at the Sonnet tier.	Sonnet	Retired	200K tokens	$3 / $15	`claude-3-5-sonnet-20240620` Source: Claude 3.5 Sonnet
2024-10-22	Claude 3.5 Sonnet upgraded snapshot Upgraded Sonnet 3.5 launched alongside computer-use beta and Haiku 3.5.	Sonnet	Retired	200K tokens	$3 / $15	`claude-3-5-sonnet-20241022` Source: Introducing computer use, a new Claude 3.5 Sonnet, and Claude 3.5 Haiku
2024-10-22	Claude 3.5 Haiku Haiku 3.5 arrived with the October 2024 Sonnet/computer-use announcement.	Haiku	Retired	200K tokens	$0.8 / $4	`claude-3-5-haiku-20241022` Source: Introducing computer use, a new Claude 3.5 Sonnet, and Claude 3.5 Haiku
2025-02-24	Claude 3.7 Sonnet Hybrid reasoning Sonnet release and Claude Code research-preview milestone.	Sonnet	Retired	200K tokens	$3 / $15	`claude-3-7-sonnet-20250219` Source: Claude 3.7 Sonnet and Claude Code
2025-05-22	Claude Sonnet 4 Claude 4 Sonnet release with stronger agent and coding capabilities.	Sonnet	Retired	200K tokens	$3 / $15	`claude-sonnet-4-20250514` Source: Introducing Claude 4
2025-05-22	Claude Opus 4 Claude 4 Opus release for highest-capability work in the Claude 4 launch.	Opus	Retired	200K tokens	$15 / $75	`claude-opus-4-20250514` Source: Introducing Claude 4
2025-08-05	Claude Opus 4.1 Opus 4.1 upgrade, deprecated June 5, 2026 and retired on schedule August 5, 2026.	Opus	Retired	200K tokens	$15 / $75	`claude-opus-4-1-20250805` Source: Claude Opus 4.1
2025-09-29	Claude Sonnet 4.5 Sonnet 4.5 launch with the same Sonnet pricing as Sonnet 4.	Sonnet	Active	200K tokens	$3 / $15	`claude-sonnet-4-5-20250929 \| claude-sonnet-4-5` Source: Introducing Claude Sonnet 4.5
2025-10-15	Claude Haiku 4.5 Current Haiku tier in the July 2026 model overview.	Haiku	Active	200K tokens	$1 / $5	`claude-haiku-4-5-20251001 \| claude-haiku-4-5` Source: Introducing Claude Haiku 4.5
2025-11-24	Claude Opus 4.5 Opus pricing reset to $5 input and $25 output per MTok.	Opus	Active	200K tokens	$5 / $25	`claude-opus-4-5-20251101 \| claude-opus-4-5` Source: Introducing Claude Opus 4.5
2026-02-05	Claude Opus 4.6 Opus release in the 1M-context era.	Opus	Active	1M tokens	$5 / $25	`claude-opus-4-6` Source: Claude Opus 4.6
2026-02-17	Claude Sonnet 4.6 Sonnet 4.6 launch with 1M context listed in pricing docs.	Sonnet	Active	1M tokens	$3 / $15	`claude-sonnet-4-6` Source: Introducing Claude Sonnet 4.6
2026-04-16	Claude Opus 4.7 Opus 4.7 launch with cybersecurity safeguards and Opus 4.6 pricing.	Opus	Active	1M tokens	$5 / $25	`claude-opus-4-7` Source: Introducing Claude Opus 4.7
2026-05-28	Claude Opus 4.8 Last Opus 4.x snapshot; superseded as the Opus-class model by Opus 5 on July 24, 2026 and still listed as legacy.	Opus	Active	1M tokens	$5 / $25	`claude-opus-4-8` Source: Introducing Claude Opus 4.8
2026-06-09	Claude Fable 5 First Fable release. Access was suspended and restored July 1, 2026; superseded by Fable 5.1 on September 1, 2026 and still listed as legacy.	Fable	Active	1M tokens	$10 / $50	`claude-fable-5` Source: Claude Fable 5 and Claude Mythos 5
2026-06-09	Claude Mythos 5 Limited-availability Project Glasswing model sharing Fable 5 specs and pricing.	Mythos	Limited	1M tokens	$10 / $50	`claude-mythos-5` Source: Claude Fable 5 and Claude Mythos 5
2026-06-30	Claude Sonnet 5 Sonnet 5 launched at $2/$10 described as introductory through August 31, 2026; that rate became standard on September 1 instead of rising.	Sonnet	Active	1M tokens	$2 / $10	`claude-sonnet-5` Source: Introducing Claude Sonnet 5
2026-07-24	Claude Opus 5 Opus-class successor to Opus 4.8 at the same $5/$25 rate, default on Claude Max, with fast mode at roughly 2.5x speed for 2x base price.	Opus	Active	1M tokens	$5 / $25	`claude-opus-5` Source: Claude Opus 5
2026-09-01	Claude Fable 5.1 Most capable generally available Claude model in the September 2026 docs, with cache reads cut to $0.25 per MTok.	Fable	Active	1M tokens	$10 / $50	`claude-fable-5-1` Source: Claude Fable 5.1 and Claude Mythos 5.1
2026-09-01	Claude Mythos 5.1 Same underlying model as Fable 5.1 with more permissive safeguards, trusted access and Project Glasswing only.	Mythos	Limited	1M tokens	$10 / $50	`claude-mythos-5-1` Source: Claude Fable 5.1 and Claude Mythos 5.1

How to use it

Use the source before the summary

Type a model name, model ID, capability note, or context value into the search box.
Use the family and status menus to narrow the release list.
Open the source link beside any row before citing a date or status.

Primary sources cited

Claude ArchiveClaude Archive Source Index Claude Platform DocsModels overview Claude Platform DocsModel deprecations Claude Platform DocsPricing

Questions this tool answers

Does the timeline explorer use unofficial Claude history?

No. Rows are tied to Anthropic-owned launch posts, platform docs, pricing docs, or model-deprecation docs.

Why do some early rows say the context window was not stated in the cited source?

Claude Archive avoids filling gaps from memory or third-party summaries. If the cited launch source does not state a value, the tool says so.

Is this a current model recommendation tool?

No. It is a historical archive. For a recommendation about which model to use now, see claudecentral.com/models, and follow the linked Claude Platform model overview and pricing docs for live specs.

What is the most recent release in the explorer?

Claude Fable 5.1 and Claude Mythos 5.1, both launched September 1, 2026. Claude Opus 5 launched July 24, 2026.