Release Notes: v0.17.0¶
Release Date: 2026-06-15
Highlights¶
- Claude Fable 5 & Mythos 5: Support for Anthropic's latest frontier models
- Claude 4.6-4.8: Full model constant support across Claude API, Bedrock, and Vertex AI
- Claude 4.5: Complete coverage for Opus 4.5, Sonnet 4.5, and Haiku 4.5
New Model Constants¶
Claude Fable 5 / Mythos 5 (Latest Frontier)¶
| Constant | Model ID | Notes |
|---|---|---|
ClaudeFable5 |
claude-fable-5 |
Most capable widely released model |
ClaudeMythos5 |
claude-mythos-5 |
Project Glasswing (limited availability) |
Claude 4.8 / 4.7 / 4.6 (Dateless Format)¶
Starting with Claude 4.6, model IDs use a dateless format (still pinned snapshots).
| Constant | Model ID | Notes |
|---|---|---|
ClaudeOpus4_8 |
claude-opus-4-8 |
Latest Opus-tier model |
ClaudeOpus4_7 |
claude-opus-4-7 |
Legacy |
ClaudeOpus4_6 |
claude-opus-4-6 |
Legacy |
ClaudeSonnet4_6 |
claude-sonnet-4-6 |
Latest Sonnet-tier model |
AWS Bedrock¶
| Constant | Bedrock Model ID |
|---|---|
BedrockClaudeFable5 |
anthropic.claude-fable-5 |
BedrockClaudeOpus4_8 |
anthropic.claude-opus-4-8 |
BedrockClaudeOpus4_7 |
anthropic.claude-opus-4-7 |
BedrockClaudeOpus4_6 |
anthropic.claude-opus-4-6-v1 |
BedrockClaudeSonnet4_6 |
anthropic.claude-sonnet-4-6 |
BedrockClaudeOpus4_5 |
anthropic.claude-opus-4-5-20251101-v1:0 |
BedrockClaudeSonnet4_5 |
anthropic.claude-sonnet-4-5-20250929-v1:0 |
BedrockClaudeHaiku4_5 |
anthropic.claude-haiku-4-5-20251001-v1:0 |
Google Vertex AI¶
| Constant | Vertex Model ID |
|---|---|
VertexClaudeFable5 |
claude-fable-5 |
VertexClaudeOpus4_8 |
claude-opus-4-8 |
VertexClaudeOpus4_7 |
claude-opus-4-7 |
VertexClaudeOpus4_6 |
claude-opus-4-6 |
VertexClaudeSonnet4_6 |
claude-sonnet-4-6 |
VertexClaudeOpus4_5 |
claude-opus-4-5@20251101 |
VertexClaudeSonnet4_5 |
claude-sonnet-4-5@20250929 |
VertexClaudeHaiku4_5 |
claude-haiku-4-5@20251001 |
Deprecations¶
The following models are marked as deprecated per Anthropic's timeline:
| Model | Retirement Date |
|---|---|
| Claude Opus 4.1 | August 5, 2026 |
| Claude Opus 4 | June 15, 2026 |
| Claude Sonnet 4 | June 15, 2026 |
Migrate to Claude Opus 4.8 or Claude Sonnet 4.6 respectively.
Usage¶
import (
"github.com/plexusone/omnillm-core"
"github.com/plexusone/omnillm-core/models"
)
// Latest models
client.Model = omnillm.ModelClaudeFable5 // Frontier
client.Model = omnillm.ModelClaudeOpus4_8 // Latest Opus
client.Model = omnillm.ModelClaudeSonnet4_6 // Latest Sonnet
// Cloud providers
client.Model = models.BedrockClaudeOpus4_8
client.Model = models.VertexClaudeSonnet4_6
Installation¶
Upgrade Notes¶
This is a backwards-compatible release. No breaking changes.