Release archive
The timeline.
Every model we track—released, announced or still a signal on the horizon.
Anthropic · FEB 05, 2026
Reasoning-focused flagship aimed at long-running agent workflows.
$15.00/Mtok
No reviewed reports yet.
Read more →Anthropic · APR 16, 2026
Improvement on Opus 4.6 in advanced software engineering, with the largest gains on the hardest tasks.
$5.00/Mtok
No reviewed reports yet.
Read more →Anthropic · MAY 28, 2026
Further reasoning gains over Opus 4.6 on long-horizon tasks.
No reviewed reports yet.
Read more →Anthropic · JUN 09, 2026
A Mythos-class model made safe for general use; state-of-the-art on nearly all tested capability benchmarks. Briefly suspended over export controls, redeployed 1 July.
$10.00/Mtok
- CodingClaude Fable 5.1 High vs Fable 5 high in claude code
Anthropic · JUN 30, 2026
Mid-tier sibling to Opus, tuned for latency-sensitive production work.
$3.00/Mtok
No reviewed reports yet.
Read more →Anthropic · JUL 24, 2026
Anthropic's flagship model, positioned for long-horizon agentic work and coding.
SWE-bench Verified 96.0%SWE-bench Pro 79.2%$15.00/Mtok
- CodingVideo game built with opus 5
Anthropic · SEP 01, 2026
Anthropic's most advanced model for coding and knowledge work, with the largest gains on terminal-based scientific and engineering work, computer use, and long-horizon agentic tasks. Around 25% cheaper than Fable 5 for typical workloads, with cache reads down 75%.
Terminal-Bench 4.0 55.8%Terminal-Bench-Science 0.1 52.6%$10.00/Mtok
- Other@argofowl: astra has been pretty solid for me after i took my time with the agents.md it's not perfect, nothing is, but i like it a bit more than fable 5.1 right now controversial i know
- Codinglaude Fable 5.1 has gone absolutely unhinged with the visual aesthetic
- CodingClaude Fable 5.1 ONE SHOTTED this Call of Duty game.
Anthropic · SEP 01, 2026
Newest Mythos-class model, with gains in cybersecurity and biology. The same underlying model as Fable 5.1 under a different safeguard layer; access remains limited to a small set of vetted organizations through Project Glasswing.
Terminal-Bench 4.0 60.9%$10.00/Mtok
No reviewed reports yet.
Read more →Anthropic · SEP 22, 2026
Anthropic's leading model for agentic coding, computer use and knowledge work, with lower costs and faster generation than Opus 5.
$20.00/Mtok
- Other@_MaxBlade: Opus 5.5 built a multiplayer lawn mow simulator with beers and cigars Made it live on my server and chat joined. the future is looking insane.
- Vision@ishuagra02: Oh my god... Opus 5.5 is the best model in 3D rendering, BY FAR. I gave the following prompt: "create a highly detailed 3D scenery that faithfully captures this photo in a cel-shaded cartoon art style" and it crushed it. The detail, the lighting, the colors, the visual fidelity... I have no words for this. Didn't even exceed the Claude Pro session limits. Cost around $38 in API usage.
- Other@bridgebench: We gave 4 models the same prompt: build a 3D rocket launch. GPT 6 Luna: <$0.01, 1 minute GPT 6 Sol: $0.11, 1 minute Grok 4.7: $0.29, 11 minutes Claude Opus 5.5: $1.52, 12 minutes GPT 6 Luna built a rocket launch scene in 65 seconds for less than a penny. The cost of frontier AI is collapsing in real time.
Anthropic · SEP 28, 2026
A faster, lower-cost complement to Opus 5.5 for everyday tasks, bug fixes and polished documents, slides and spreadsheets.
Terminal-Bench 4.0 70.6%FrontierCode 1.1 (Max) 46.2%$10.00/Mtok
- Agentic@_MaxBlade: sonnet 5.5 just built the most addicting game I have ever played... 🤯 only up clone. fully multiplayer and running in the browser, i made it over 200m before falling. link below, how far can you go?
- Other@filicroval: what the fuck, why is Sonnet 5.5 this good?? gave Sonnet and Opus 5.5 the exact same prompt. Sonnet came back with this masterpiece. all in a SINGLE HTML file. Sonnet won this one, it's not even close
- Agentic@_MaxBlade: I asked Sonnet 5.5 to create a overcooked clone i could play in the broswer. the results shocked me... It is delivering triple aaa level polish at 20x cheaper than opus 5.5 if you put it in x-high it will RUN. this model will be a perfect worker agent for opus 5.5 or the upcoming fable 5.5 to orchestrate. Anthropic is MOGGGING rn.
Anthropic · OCT 07, 2026
Anthropic's fastest small model, designed for high-volume, cost-sensitive work such as summaries, compaction, classification, subagents and latency-sensitive browser use.
OSWorld 2.1 (offline subset) 72.4%Humanity's Last Exam (tools) 57.4%$0.50/Mtok
No reviewed reports yet.
Read more →Anthropic · expected NOV 02, 2026
Tracked by modelrumor.com (Estimate / Nov 2).
medium confidence · credible reporting
No reviewed reports yet.
Read more →Anthropic · expected NOV 20, 2026
Tracked by modelrumor.com (Unconfirmed / Nov 2026).
medium confidence · credible reporting
No reviewed reports yet.
Read more →Anthropic · expected NOV 30, 2026
Next Opus generation. Rumored only.
No reviewed reports yet.
Read more →