Claude Opus Latest (Claude Opus 5.5)

SitePoint reports on FrontierCode v1.1 benchmark data for Claude Opus 5, the model Eden AI exposes under "anthropic/claude-opus-latest," published July 24, 2026. The core finding is that Opus 5 at medium reasoning effort delivers nearly the same accuracy as the highest-scoring configurations tested, at 1.5× baseline co The article discloses that FrontierCode v1.1's methodology, task set, and evaluation harness have not been independently verified by SitePoint, and that the sibling "Claude Fable 5" and "GPT-5.6 Sol" names have not been confirmed in public Anthropic or OpenAI model listings, possibly representing pre-release labels. De

Fortune's July 24, 2026 report details that Claude Opus 5 ships with a user-facing toggle letting customers select low, medium, or high effort per task, enabling direct trade-offs between cost and capability. Anthropic stated the model is easier to use than predecessors, requiring less back-and-forth, and that it verif The coverage also notes that Fable 5 was the model subject to temporary U.S. export controls after Amazon researchers reported bypassable safeguards, and that Anthropic took Fable 5 off the market on June 12 before re-releasing it. This context distinguishes Opus 5's positioning from the regulatory turbulence around Fa

CNBC's July 24, 2026 coverage reports that Anthropic announced Claude Opus 5 as "its best-performing and most cost-effective offering," noting that Opus 5 outperforms Claude Fable 5 on coding and knowledge work evaluations but is not state-of-the-art for "risky, dual-use capabilities" such as cybersecurity. The article The piece situates Opus 5 within a competitive landscape in which Anthropic and OpenAI face pressure from cheaper offerings by Microsoft, Amazon, Google, and Chinese startups. It emphasizes that Opus 5 is "designed to be used every day" per Anthropic's blog post, reinforcing its positioning as a productivity workhorse

VentureBeat's July 24, 2026 analysis provides the strongest quantitative detail: Opus 5 is priced at $5/$25 per million tokens unchanged from Opus 4.8, becomes the default on Claude Max and the strongest model on Claude Pro, and posts a 43.3 percent score on Frontier-Bench v0.1—more than double Opus 4.8's 18.7 percent An Anthropic spokesperson is quoted stratifying the lineup: "Opus 5 as your daily driver… Fable 5 for your most ambitious work… Sonnet 5 for work you run at scale… Haiku 4.5 for subagents and instant answers." The article frames Opus 5's launch as a shift in the AI race from raw capability toward the economics of daily

Layer3Labs' guide on Claude Opus 5 benchmarks, reviewed by Jonathan West and updated September 9, 2026, explicitly names the model Eden AI lists as "anthropic/claude-opus-latest." It characterizes Anthropic's published evaluation coverage as spanning coding, agentic tool use, graduate-level reasoning, and math, and fra Rather than republishing scores, the guide links directly to Anthropic's model announcement and release documentation and stresses that published numbers can change and secondhand copies quickly become outdated. It also warns developers that benchmark scores are proxies, not guarantees, pointing to risks of benchmark c

CodingFleet's head-to-head comparison of DeepSeek V4.1 Flash and Claude Opus 5 surfaces concrete Anthropic launch details for the model Eden AI exposes as "anthropic/claude-opus-latest." The page lists Opus 5 as released July 24, 2026, with a 1M-token context window, 128K maximum output, and pricing of $5.00 per 1M inp On benchmarks, the comparison reports Opus 5 scores of 89.1 on Terminal-Bench 2.1, 56.3 on HLE, plus deltas of +13.3 and +20.6 on Terminal-Bench 3.0 and 4.0, +16.7 on ProgramBench, and +9.9 on NL2Repo against DeepSeek V4.1 Flash, while losing Terminal-Bench 2.1 (90.6 vs 89.1), DeepSWE v1.1 (74.0 vs 74.2), Automation-Be

Anthropic's Claude Platform release notes for September 3 and September 1, 2026 document that Claude Fable 5.1 accepts thinking blocks from Claude Opus 5 alongside Opus's own predecessors, implicitly confirming Opus 5 as a distinct, prior Anthropic model with its own thinking-block compatibility profile. The platform n The same page also covers the ant CLI 1.30.0 release adding "ant apply" for declarative resource management from repository files, plus a lockfile mechanism for reproducible updates across machines and CI. While these entries are not Opus 5-specific, the explicit mention that Fable 5.1 can read Opus 5 thinking blocks s

Anthropic's official release notes confirm that Claude Opus 5 launched on July 24, 2026, described as "a thoughtful and proactive model that comes close to the frontier intelligence of Claude Fable 5 at half the price." This entry, dated July 2026, distinguishes Opus 5 from later September 2026 releases of Claude Fable The same release notes page situates Opus 5 within a broader month-by-month changelog that includes HIPAA self-serve configuration (July 14), updated memory behavior (July 10), and skill/plugin security scanning in beta (August 6). These adjacent entries provide context for the platform changes shipping around Opus 5's