feat: add OpenAI GPT-5.6 Sol/Terra/Luna pricing with context tiers for Bedrock CRIS

[akhilmmenon]

Summary

• Add pricing and general config entries for OpenAI GPT-5.6 Sol, Terra, and Luna models on AWS Bedrock (bedrock-runtime endpoint) with cross-region inference profiles
• 8 model IDs added: us. (Geo CRIS), in. (Geo CRIS, Terra/Luna only), global. (Global CRIS)
• Pricing includes custom_pricing with context_tier_map for Short (≤272K) and Long (>272K) context window tiers, following the same structure as vertex-ai.json

Models added to pricing/bedrock.json:

• us.openai.gpt-5.6-sol, global.openai.gpt-5.6-sol
• us.openai.gpt-5.6-terra, in.openai.gpt-5.6-terra, global.openai.gpt-5.6-terra
• us.openai.gpt-5.6-luna, in.openai.gpt-5.6-luna, global.openai.gpt-5.6-luna

Models added to general/bedrock.json:

• Same 8 model IDs with Converse API-aligned config (max_tokens: 272000, image support, temperature/top_p removed as reasoning models)

Pricing structure

• pricing_config (top-level): Short context fallback pricing
• custom_pricing.context_tier_map: {"0": "lte-272k", "272000": "gt-272k"}
• custom_pricing.regions.default.execution_modes.standard.context_tiers: Short and Long tier pricing

Region-based pricing (custom_pricing.regions) uses "default" because these models are only available via cross-region inference profiles on bedrock-runtime — AWS charges a flat rate per inference option (Geo/Global), not per individual AWS region. The Geo vs Global price difference is encoded in separate model IDs (us./in. vs global.).

Pricing source

• us.* / in.* entries: Geo CRIS pricing from AWS model cards
• global.* entries: Global CRIS pricing
• Sol model card
• Terra model card
• Luna model card

Ref: Pylon #8200

Test plan

• Pricing values verified against AWS model cards for all 3 models × all inference options × both context tiers
• Structure consistent with existing vertex-ai.json context tier pattern
• [] E2E tested with live Bedrock requests (200 OK responses with correct model routing)

[Copilot]

Pull request overview

Adds Bedrock cross-region pricing and model metadata for eight OpenAI GPT-5.6 inference profiles.

Changes:

• Adds geo and global pricing for Sol, Terra, and Luna.
• Adds token limits, image support, and reasoning-model parameter exclusions.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
pricing/bedrock.json	Adds cross-region GPT-5.6 pricing.
general/bedrock.json	Adds GPT-5.6 model configurations.

Suppressed comments (5)

general/bedrock.json:2122

• This profile omits the model's tool-use capability, so consumers of this metadata will disable tools even though the same model is marked tool-capable in general/bedrock-mantle.json:353-356. Include tools in the supported capabilities for Converse requests.

    "type": { "primary": "chat", "supported": ["image"] },

general/bedrock.json:2132

• This profile omits the model's tool-use capability, so consumers of this metadata will disable tools even though the same model is marked tool-capable in general/bedrock-mantle.json:358-361. Include tools in the supported capabilities for Converse requests.

    "type": { "primary": "chat", "supported": ["image"] },

general/bedrock.json:2137

• This profile omits the model's tool-use capability, so consumers of this metadata will disable tools even though the same model is marked tool-capable in general/bedrock-mantle.json:358-361. Include tools in the supported capabilities for Converse requests.

    "type": { "primary": "chat", "supported": ["image"] },

general/bedrock.json:2147

• This profile omits the model's tool-use capability, so consumers of this metadata will disable tools even though the same model is marked tool-capable in general/bedrock-mantle.json:363-366. Include tools in the supported capabilities for Converse requests.

    "type": { "primary": "chat", "supported": ["image"] },

general/bedrock.json:2152

• This profile omits the model's tool-use capability, so consumers of this metadata will disable tools even though the same model is marked tool-capable in general/bedrock-mantle.json:363-366. Include tools in the supported capabilities for Converse requests.

    "type": { "primary": "chat", "supported": ["image"] },

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[akhilmmenon]

Test Results

Config validation

All 8 model entries resolve correctly in both pricing and general configs:

--- Pricing ---
✓ us.openai.gpt-5.6-sol {"price":0.00055}
✓ global.openai.gpt-5.6-sol {"price":0.0005}
✓ us.openai.gpt-5.6-terra {"price":0.00022}
✓ in.openai.gpt-5.6-terra {"price":0.00022}
✓ global.openai.gpt-5.6-terra {"price":0.0002}
✓ us.openai.gpt-5.6-luna {"price":0.000022}
✓ in.openai.gpt-5.6-luna {"price":0.000022}
✓ global.openai.gpt-5.6-luna {"price":0.00002}

--- General ---
✓ us.openai.gpt-5.6-sol [ 'image' ]
✓ global.openai.gpt-5.6-sol [ 'image' ]
✓ us.openai.gpt-5.6-terra [ 'image' ]
✓ in.openai.gpt-5.6-terra [ 'image' ]
✓ global.openai.gpt-5.6-terra [ 'image' ]
✓ us.openai.gpt-5.6-luna [ 'image' ]
✓ in.openai.gpt-5.6-luna [ 'image' ]
✓ global.openai.gpt-5.6-luna [ 'image' ]

End-to-end verification

Tested locally against bedrock-runtime with the gateway regex fix applied. Request to us.openai.gpt-5.6-luna returns 200 OK with correct model attribution and usage tracking:

{
    "model": "us.openai.gpt-5.6-luna",
    "provider": "bedrock",
    "choices": [{"message": {"content": "Hello! How can I help you today?"}, "finish_reason": "stop"}],
    "usage": {"prompt_tokens": 8, "completion_tokens": 13, "total_tokens": 21}
}

[narengogi]

@akhilmmenon please resolve conflicts